Contact Info
Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf
Electrode
Citations 16
"Indirect Potentiometric Monitoring Of Proteins With A Copper Electrode"
Anal. Chim. Acta
1985 Volume 173, Issue 1 Pages 337-341
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]M. L. Hitchman and F. W. M. NyasuluCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( 'id' => '001031', 'citation_id' => '004761', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ) ), 'Matrix' => array( (int) 0 => array( [maximum depth reached] ) ), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ) ) ), 'i' => (int) 0 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( 'id' => '001031', 'citation_id' => '004761', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '02008', 'name' => 'Proteins', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '60', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => '', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'P', 'nametotal' => 'Proteins**60', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '01687', 'name' => 'Ovalbumins', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '1', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'O', 'nametotal' => 'Ovalbumins**1', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '01890', 'name' => 'Phosvitins', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '1', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'P', 'nametotal' => 'Phosvitins**1', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '00544', 'name' => 'Enzyme, catalase', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '3', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Enzymes', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'E', 'nametotal' => 'Enzyme, catalase**3', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '01042', 'name' => 'Globulins', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '1', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'G', 'nametotal' => 'Globulins**1', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 5 => array( 'id' => '00092', 'name' => 'Albumin', 'iupac_name' => 'NA', 'casrn' => '9006-50-2', 'synonyms' => 'Albumin; Albumin from Eggs Soluble; Ovalbumine', 'total' => '58', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Proteins', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'A', 'nametotal' => 'Albumin**58', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array( (int) 0 => array( 'id' => '0101', 'label' => 'Human Blood', 'level1' => 'Biological fluid', 'level2' => 'blood', 'level3' => 'human', 'level4' => '', 'level5' => '', 'synonyms' => '', 'total' => '16', 'url' => '', 'updated' => '2015-12-09 20:50:58', 'name' => 'Biological fluid, blood, human', 'nametotal' => 'Biological fluid, blood, human**16', 'first' => 'B', 'CitationsMatrix' => array( [maximum depth reached] ) ) ), 'Keyword' => array( (int) 0 => array( 'id' => '0217', 'type' => 'Chemical Process', 'keyword' => 'Interferences', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '1972', 'first' => 'I', 'keytotal' => 'Interferences**1972', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '0212', 'type' => 'Analysis Mode', 'keyword' => 'Indirect', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '346', 'first' => 'I', 'keytotal' => 'Indirect**346', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 0 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0003-2670(00)84974-0' $aus = 'M. L. Hitchman and F. W. M. Nyasulu'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.
Proteins
Ovalbumins
Phosvitins
Enzyme, catalase
Globulins
Albumin
Human Blood
Interferences
Indirect
"Potentiometric Detection In Capillary Electrophoresis With A Metallic Copper Electrode"
Anal. Chim. Acta
1997 Volume 354, Issue 1-3 Pages 129-134
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Thomas Kappes and Peter C. Hauser*Code Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '003336', 'citation_id' => '006503', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ) ) ), 'i' => (int) 1 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '003336', 'citation_id' => '006503', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00048', 'name' => 'Acids, organic', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '12', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'yes', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'A', 'nametotal' => 'Acids, organic**12', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '00245', 'name' => 'Anions', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '28', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'A', 'nametotal' => 'Anions**28', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '00160', 'name' => 'Amino Acids', 'iupac_name' => '', 'casrn' => 'NA', 'synonyms' => 'alanine; arginine; asparagine; aspartic acid; cysteine; glutamine; glutamic acid; glycine; histidine; isoleucine; leucine; lysine; methionine; phenylalanine; proline; serine; threonine; tryptophan; tyrosin; valine', 'total' => '124', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Amino acids', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'A', 'nametotal' => 'Amino Acids**124', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( 'id' => '0339', 'type' => 'Manifold process', 'keyword' => 'Post-column derivatization', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '646', 'first' => 'P', 'keytotal' => 'Post-column derivatization**646', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 1 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0003-2670(97)00439-X' $aus = 'Thomas Kappes and Peter C. Hauser*'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine.
Acids, organic
Anions
Amino Acids
Post-column derivatization
"Potentiometric Monitoring Of Proteins. 6. Indirect Potentiometry"
Talanta
1993 Volume 40, Issue 9 Pages 1449-1459
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Michael L. Hitchman and Frazier W. M. NyasuluCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '003893', 'citation_id' => '007049', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ) ) ), 'i' => (int) 2 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '003893', 'citation_id' => '007049', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '02008', 'name' => 'Proteins', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '60', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => '', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'P', 'nametotal' => 'Proteins**60', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '00160', 'name' => 'Amino Acids', 'iupac_name' => '', 'casrn' => 'NA', 'synonyms' => 'alanine; arginine; asparagine; aspartic acid; cysteine; glutamine; glutamic acid; glycine; histidine; isoleucine; leucine; lysine; methionine; phenylalanine; proline; serine; threonine; tryptophan; tyrosin; valine', 'total' => '124', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Amino acids', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'A', 'nametotal' => 'Amino Acids**124', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( 'id' => '0302', 'type' => 'Feature', 'keyword' => 'Optimization', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '1069', 'first' => 'O', 'keytotal' => 'Optimization**1069', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '0212', 'type' => 'Analysis Mode', 'keyword' => 'Indirect', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '346', 'first' => 'I', 'keytotal' => 'Indirect**346', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 2 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/0039-9140(93)80225-G' $aus = 'Michael L. Hitchman and Frazier W. M. Nyasulu'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.
Proteins
Amino Acids
Optimization
Indirect
"Direct Reductive Amperometric Determination Of Nitrate At A Copper Electrode Formed Insitu In A Capillary-fill Sensor Device"
Analyst
1991 Volume 116, Issue 6 Pages 573-579
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. BirchCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( 'id' => '004844', 'citation_id' => '007629', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ) ) ), 'i' => (int) 3 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( 'id' => '004844', 'citation_id' => '007629', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '01588', 'name' => 'Nitrate', 'iupac_name' => 'nitrate', 'casrn' => '14797-55-8', 'synonyms' => 'Nitrate ; nitrates; Nitrates, inorganic, aqueous solution, n.o.s.; Nitrates/nitrites; Nitrate ion;', 'total' => '180', 'inchi' => 'InChI=1S/NO3/c2-1(3)4/q-1', 'inchikey' => 'NHNBFGGVMKEFGY-UHFFFAOYSA-N', 'formula' => 'NO3-', 'oxstate' => '+5', 'url' => '', 'charge' => '-1', 'class1' => 'Inorganic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:32:40', 'first' => 'N', 'nametotal' => 'Nitrate**180', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( 'id' => '0387', 'type' => 'Analysis Type', 'keyword' => 'Reverse', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '127', 'first' => 'R', 'keytotal' => 'Reverse**127', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '0043', 'type' => 'Manifold component', 'keyword' => 'Apparatus', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '466', 'first' => 'A', 'keytotal' => 'Apparatus**466', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '0110', 'type' => 'Manifold component', 'keyword' => 'Detector', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '354', 'first' => 'D', 'keytotal' => 'Detector**354', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 3 $path = '' $a = '' $url = 'http://dx.doi.org/10.1039/an9911600573' $aus = 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.
Nitrate
Reverse
Apparatus
Detector
"Constant Potential Amperometric Detection Of Underivatized Amino-acids And Peptides At A Copper Electrode"
Anal. Chem.
1991 Volume 63, Issue 17 Pages 1702-1707
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Peifang Luo, Fuzhen Zhang, and Richard P. BaldwinCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( 'id' => '006423', 'citation_id' => '008630', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array() ), 'i' => (int) 4 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( 'id' => '006423', 'citation_id' => '008630', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00160', 'name' => 'Amino Acids', 'iupac_name' => '', 'casrn' => 'NA', 'synonyms' => 'alanine; arginine; asparagine; aspartic acid; cysteine; glutamine; glutamic acid; glycine; histidine; isoleucine; leucine; lysine; methionine; phenylalanine; proline; serine; threonine; tryptophan; tyrosin; valine', 'total' => '124', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Amino acids', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'A', 'nametotal' => 'Amino Acids**124', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '01751', 'name' => 'Peptides', 'iupac_name' => '', 'casrn' => 'NA', 'synonyms' => 'NA', 'total' => '26', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'NA', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'P', 'nametotal' => 'Peptides**26', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array() ) $i = (int) 4 $path = '' $a = '' $url = 'http://dx.doi.org/10.1021/ac00017a010' $aus = 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.
Amino Acids
Peptides
"Potentiometric Flow Injection Determination Of Sugar Using A Metallic Copper Electrode"
Anal. Lett.
1985 Volume 18, Issue 16 Pages 1953-1978
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.Code Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '007902', 'citation_id' => '009556', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ) ) ), 'i' => (int) 5 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '007902', 'citation_id' => '009556', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00508', 'name' => 'Carbohydrates', 'iupac_name' => '', 'casrn' => 'NA', 'synonyms' => 'NA', 'total' => '46', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'NA', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'C', 'nametotal' => 'Carbohydrates**46', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '01001', 'name' => 'Fructose', 'iupac_name' => '(3S,4R,5R)-2-(hydroxymethyl)oxane-2,3,4,5-tetrol', 'casrn' => '7660-25-5', 'synonyms' => 'Arabino-hexulose; β-D-fructopyranose; Fructopyranose; Fructose', 'total' => '42', 'inchi' => 'InChI=1S/C6H12O6/c7-1-3(9)5(11)6(12)4(10)2-8/h3,5-9,11-12H,1-2H2/t3-,5-,6-/m1/s1', 'inchikey' => 'LKDRXBCSQODPBY-VRPWFDPXSA-N', 'formula' => 'C6H12O6', 'oxstate' => '', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Sugars', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 16:21:31', 'first' => 'F', 'nametotal' => 'Fructose**42', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '01057', 'name' => 'Glucose', 'iupac_name' => '(3R,4S,5S,6R)-6-(hydroxymethyl)oxane-2,3,4,5-tetrol', 'casrn' => '50-99-7', 'synonyms' => 'Corn sugar; D(+)-Glucopyranose; D-Glucose; D-(+)-Glucose; Dextrose; Glu; Glucose; Grape sugar;', 'total' => '540', 'inchi' => 'InChI=1S/C6H12O6/c7-1-3(9)5(11)6(12)4(10)2-8/h1,3-6,8-12H,2H2/t3-,4+,5+,6+/m0/s1', 'inchikey' => 'WQZGKKKJIJFFOK-GASJEMHNSA-N', 'formula' => 'C6H12O6', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Sugars', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 09:58:51', 'first' => 'G', 'nametotal' => 'Glucose**540', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '01426', 'name' => 'Maltose', 'iupac_name' => '(2R,3S,4S,5R,6R)-2-(hydroxymethyl)-6-[(2R,3S,4R,5R,6R)-4,5,6-trihydroxy-2-(hydroxymethyl)oxan-3-yl]oxyoxane-3,4,5-triol', 'casrn' => '69-79-4', 'synonyms' => 'α-Maltose; D-Glucose, 4-O-α-D-glucopyranosyl-; D-(+)-Maltose; Maltose; Malt sugar', 'total' => '26', 'inchi' => 'InChI=1S/C12H22O11/c13-1-3-5(15)6(16)9(19)12(22-3)23-10-4(2-14)21-11(20)8(18)7(10)17/h3-20H,1-2H2', 'inchikey' => 'GUBGYTABKSRVRQ-QUYVBRFLSA-N', 'formula' => 'C12H22O11', 'oxstate' => '', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'Sugars', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 16:11:47', 'first' => 'M', 'nametotal' => 'Maltose**26', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '02186', 'name' => 'Sorbose', 'iupac_name' => '(3S,4R,5S)-2-(hydroxymethyl)oxane-2,3,4,5-tetrol', 'casrn' => '', 'synonyms' => 'L-Sorbose, Sorbopyranose, Sorbose, Sorbopyranoside, L-Sorbopyranose, L-Sorbopyranoside, L-Sor, Xylo-Hexopyran-2-ulose, Xylo-Hex-2-ulo-Pyranose, ST075002, L-Xylo-Hexopyran-2-ulose, L-Xylo-Hex-2-ulo-Pyranose, L-xylo-Hexulose, Sor, AC1L96UN, SCHEMBL3137590, CHEBI:48649, AKOS024284330, S0066, C00247, (3S,4R,5S)-2-(hydroxymethyl)oxane-2,3,4,5-tetrol', 'total' => '2', 'inchi' => 'InChI=1S/C6H12O6/c7-1-3(9)5(11)6(12)4(10)2-8/h3,5-9,11-12H,1-2H2/t3-,5+,6+/m1/s1', 'inchikey' => 'LKDRXBCSQODPBY-AMVSKUEXSA-N', 'formula' => 'C6H12O6', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-10-23 21:37:14', 'first' => 'S', 'nametotal' => 'Sorbose**2', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( 'id' => '0188', 'type' => 'Manifold process', 'keyword' => 'Heated reaction', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '504', 'first' => 'H', 'keytotal' => 'Heated reaction**504', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '0339', 'type' => 'Manifold process', 'keyword' => 'Post-column derivatization', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '646', 'first' => 'P', 'keytotal' => 'Post-column derivatization**646', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 5 $path = '' $a = '' $url = 'http://dx.doi.org/10.1080/00032718508067964' $aus = 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).
Carbohydrates
Fructose
Glucose
Maltose
Sorbose
Heated reaction
Post-column derivatization
"Liquid Chromatography - Amperometric Detection Of Catechol, Resorcinol, And Hydroquinone With A Copper-based Chemically Modified Electrode"
Electroanalysis
1992 Volume 4, Issue 2 Pages 183-189
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Jianxun Zhou, Erkang WangCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( 'id' => '008420', 'citation_id' => '009847', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ) ) ), 'i' => (int) 6 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( 'id' => '008420', 'citation_id' => '009847', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00548', 'name' => 'Catechol', 'iupac_name' => 'benzene-1,2-diol', 'casrn' => '120-80-9', 'synonyms' => '1,2-Benzenediol; 1,2-Dihydroxybenzene; 1,2-DIHYDROXYBENZENE (CATECHOL) 3346 NJRTK NO.; o-Benzenediol; o Dihydroxybenzene; Benzcatechin; Catechol; Catechol-pyrocatechol; Pyrocatechin; Pyrocatechol', 'total' => '18', 'inchi' => 'InChI=1S/C6H6O2/c7-5-3-1-2-4-6(5)8/h1-4,7-8H', 'inchikey' => 'YCIMNLLNPGFGHC-UHFFFAOYSA-N', 'formula' => 'C6H6O2', 'oxstate' => '', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 09:54:36', 'first' => 'C', 'nametotal' => 'Catechol**18', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '02086', 'name' => 'Resorcinol', 'iupac_name' => 'benzene-1,3-diol', 'casrn' => '108-46-3', 'synonyms' => '1,3-Benzenediol; ?-Resorcinol; m-Benzenediol; m-Dihydroxybenzene; m-Dioxybenzene; m-Hydroquinone; m-Hydroxyphenol; Benzene, 1,3-dihydroxy-; C.I. Developer 4; C.I. Oxidation Base 31; C.I. 76505; Developer O; Developer R; Developer RS; Durafur Developer G; Fouramine RS; Fourrine EW; Fourrine 79; Nako TGG; Pelagol Grey RS; Pelagol RS; Resorcin; Resorcine, technical; 1,3-Dihydroxybenzene; 3-Hydroxyphenol; Benzene, m-dihydroxy-; Dihydroxybenzol; Phenol, m-hydroxy-; NCI-C05970; Rcra waste number U201; Resorcine; UN 2876; Cohedur RK; Eskamel; m-Dihydroxybenzene 1,3-dihydroxybenzene 3-hydroxyphenol; 1,3-Dihydroxybenzene (resorcinol)', 'total' => '8', 'inchi' => 'InChI=1S/C6H6O2/c7-5-2-1-3-6(8)4-5/h1-4,7-8H', 'inchikey' => 'GHMLBKRAJCXXBS-UHFFFAOYSA-N', 'formula' => 'C6H6O2', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:36:24', 'first' => 'R', 'nametotal' => 'Resorcinol**8', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '01211', 'name' => 'Hydroquinone', 'iupac_name' => 'benzene-1,4-diol', 'casrn' => '123-31-9', 'synonyms' => '1,4-Benzenediol; p-Benzenediol; p-Dihydroxybenzene; p-Dioxybenzene; p-Hydroquinone; p-Hydroxyphenol; Arctuvin; Benzohydroquinone; Benzoquinol; Diak 5; Eldopaque; Eldoquin; Hidroquinone; Hydroquinol; HE 5; Phiaquin; Quinol; Tecquinol; Tenox HQ; 1,4-Dihydroxybenzene; 4-Hydroxyphenol; p-Dioxobenzene; Hydrochinone; ?-hydroquinone; ?-quinol; Artra; Benzene, p-dihydroxy-; Black and White Bleaching Cream; Derma-Blanch; Dihydroxybenzene; Hydrochinon; Hydroquinole; HQ; Idrochinone; Melanex; NCI-C55834; Tequinol; USAF ek-356; 1,4-Dihydroxy-benzeen; 1,4-Dihydroxy-benzol; 1,4-Dihydroxybenzen; 1,4-Diidrobenzene; UN 2662; Dihydroquinone; Aida; component of Artra; Eldopacque; Eldopaque forte; Eldoquin forte; Hydroquinone, 1,4-benzenediol; p-Hydroxybenzene; Solaquin forte; Tecquinol tech. grade; 1,4-Benzenediol (hydroquinone)', 'total' => '8', 'inchi' => 'InChI=1S/C6H6O2/c7-5-1-2-6(8)4-3-5/h1-4,7-8H', 'inchikey' => 'QIGBRXMKCJKVMJ-UHFFFAOYSA-N', 'formula' => ' C6H6O2', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 10:00:06', 'first' => 'H', 'nametotal' => 'Hydroquinone**8', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( 'id' => '0217', 'type' => 'Chemical Process', 'keyword' => 'Interferences', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '1972', 'first' => 'I', 'keytotal' => 'Interferences**1972', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 6 $path = '' $a = '' $url = 'http://dx.doi.org/10.1002/elan.1140040208' $aus = 'Jianxun Zhou, Erkang Wang'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.
Catechol
Resorcinol
Hydroquinone
Interferences
"Ion Chromatography Of Magnesium, Calcium, Strontium And Barium Ions Using A Metallic Copper Electrode As A Potentiometric Detector"
J. Chromatogr. A
1984 Volume 294, Issue 1 Pages 397-402
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]P. R. Haddad, P. W. Alexander, and M. TrojanowiczCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( 'id' => '008876', 'citation_id' => '010031', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array() ), 'i' => (int) 7 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( 'id' => '008876', 'citation_id' => '010031', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00362', 'name' => 'Barium', 'iupac_name' => 'barium', 'casrn' => '7440-39-3', 'synonyms' => 'Ba; UN 1399; UN 1400; UN 1854', 'total' => '17', 'inchi' => 'InChI=1S/Ba', 'inchikey' => 'DSAJWYNOEDNPEQ-UHFFFAOYSA-N', 'formula' => 'Ba', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'Element', 'class2' => 'Metal', 'class3' => 'Alkaline earth metal', 'class4' => 'Atom', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 16:18:02', 'first' => 'B', 'nametotal' => 'Barium**17', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '00485', 'name' => 'Calcium', 'iupac_name' => 'calcium', 'casrn' => '7440-70-2', 'synonyms' => 'Calcium; CALCIUM METAL IN ?', 'total' => '225', 'inchi' => 'InChI=1S/Ca.2H', 'inchikey' => 'OYPRJOBELJOOCE-UHFFFAOYSA-N', 'formula' => 'Ca', 'oxstate' => '', 'url' => '', 'charge' => '0', 'class1' => 'Element', 'class2' => 'Metal', 'class3' => 'Alkaline earth metal', 'class4' => 'Atom', 'class5' => 'NA', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 09:54:10', 'first' => 'C', 'nametotal' => 'Calcium**225', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '01412', 'name' => 'Magnesium', 'iupac_name' => 'magnesium', 'casrn' => '7439-95-4', 'synonyms' => 'Magnesium; MAGNESIUM, METAL TURNINGS; MAGNESIUM TURNINGS', 'total' => '162', 'inchi' => 'InChI=1S/Mg', 'inchikey' => 'FYYHWMGAXLPEAU-UHFFFAOYSA-N', 'formula' => 'Mg', 'oxstate' => '', 'url' => '', 'charge' => '0', 'class1' => 'Element', 'class2' => 'Metal', 'class3' => 'Alkaline earth metal', 'class4' => 'Atom', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:31:04', 'first' => 'M', 'nametotal' => 'Magnesium**162', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '02206', 'name' => 'Strontium', 'iupac_name' => 'strontium', 'casrn' => '7440-24-6', 'synonyms' => 'Sr', 'total' => '17', 'inchi' => 'InChI=1S/Sr', 'inchikey' => 'CIOAGBVUUVVLOB-UHFFFAOYSA-N', 'formula' => 'Sr', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'Element', 'class2' => 'Metal', 'class3' => 'Alkaline earth metal', 'class4' => 'Atom', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:37:24', 'first' => 'S', 'nametotal' => 'Strontium**17', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array() ) $i = (int) 7 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0021-9673(01)96151-5' $aus = 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.
Barium
Calcium
Magnesium
Strontium
"High Performance Liquid Chromatography Of Organic Acids With Potentiometric Detection Using A Metallic Copper Electrode"
J. Chromatogr. A
1984 Volume 315, Issue 1 Pages 261-270
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]P. R. Haddad, P. W. Alexander, and M. TrojanowiczCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( 'id' => '008893', 'citation_id' => '010039', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array() ), 'i' => (int) 8 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( 'id' => '008893', 'citation_id' => '010039', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '01105', 'name' => 'Glycinate', 'iupac_name' => '2-aminoacetate', 'casrn' => '', 'synonyms' => 'glycinate, 2-aminoacetate, aminoacetate, Athenon, Glycine, free base, glycine anion, gly(-), AC1L1AC3, H2N-CH2-COO(-), CHEBI:32508, DHMQDGOQFOQNFH-UHFFFAOYSA-M', 'total' => '1', 'inchi' => 'InChI=1S/C2H5NO2/c3-1-2(4)5/h1,3H2,(H,4,5)/p-1', 'inchikey' => 'DHMQDGOQFOQNFH-UHFFFAOYSA-M', 'formula' => 'C2H4NO2-', 'oxstate' => null, 'url' => '', 'charge' => '-1', 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-10-23 09:59:11', 'first' => 'G', 'nametotal' => 'Glycinate**1', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '01081', 'name' => 'Glutamate', 'iupac_name' => '2-aminopentanedioic acid', 'casrn' => 'NA', 'synonyms' => 'NA', 'total' => '27', 'inchi' => 'InChI=1S/C5H9NO4/c6-3(5(9)10)1-2-4(7)8/h3H,1-2,6H2,(H,7,8)(H,9,10)/p-2/t3-/m0/s1', 'inchikey' => 'WHUUTDBJXJRKMK-UHFFFAOYSA-N', 'formula' => 'C5H8NO4-', 'oxstate' => '-1', 'url' => '', 'charge' => '0', 'class1' => 'Biological', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => 'Amino acids', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 09:58:59', 'first' => 'G', 'nametotal' => 'Glutamate**27', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '01688', 'name' => 'Oxalate', 'iupac_name' => 'oxalate', 'casrn' => 'NA', 'synonyms' => 'None', 'total' => '35', 'inchi' => 'InChI=1S/C2H2O4/c3-1(4)2(5)6/h(H,3,4)(H,5,6)/p-2', 'inchikey' => 'MUBZPKHOEPUJKR-UHFFFAOYSA-L', 'formula' => 'C2O4-2', 'oxstate' => '', 'url' => '', 'charge' => '-2', 'class1' => 'Inorganic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:33:22', 'first' => 'O', 'nametotal' => 'Oxalate**35', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '00005', 'name' => 'Acetate ion', 'iupac_name' => 'acetate', 'casrn' => '64-19-7', 'synonyms' => 'Acetic acid; Acetic acid, solution, more than 10% but not more than 80% acid; Ethylic acid; Glacial acetic acid; Methanecarboxylic acid; Shotgun; TCLP extraction fluid 2; vinegar; Vinegar acid ** Ethanoic acid;Ethylic acid;Glacial acetic acid;Methanecarboxylic acid;Vinegar acid;CH3COOH;component of Aci-Jel;Acetasol;Acide acetique;Acido acetico;Azijnzuur;Essigsaeure;Octowy kwas;Acetic acid, glacial;Kyselina octova;UN 2789;UN 2790;Aci-jel;Shotgun;TCLP extraction fluid 2;Vinegar', 'total' => '9', 'inchi' => 'InChI=1S/C2H4O2/c1-2(3)4/h1H3,(H,3,4)/p-1', 'inchikey' => 'QTBSBXVTEAMEQO-UHFFFAOYSA-M', 'formula' => 'C2H3O2-', 'oxstate' => 'Zero', 'url' => '', 'charge' => '-1', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => 'Acids', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 09:27:18', 'first' => 'A', 'nametotal' => 'Acetate ion**9', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '01335', 'name' => 'Lactate', 'iupac_name' => '2-hydroxypropanoic acid', 'casrn' => '50-21-5', 'synonyms' => '2-Hydroxypropanoic acid; Lactic acid', 'total' => '74', 'inchi' => 'InChI=1S/C3H6O3/c1-2(4)3(5)6/h2,4H,1H3,(H,5,6)/p-1', 'inchikey' => 'JVTAAEKCZFNVCJ-UHFFFAOYSA-N', 'formula' => 'C3H5O3+', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => 'Acids', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:30:21', 'first' => 'L', 'nametotal' => 'Lactate**74', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 5 => array( 'id' => '00995', 'name' => 'Formate', 'iupac_name' => 'formate', 'casrn' => '71-47-6', 'synonyms' => 'formate, Formic acid, ion(1-), HCO2 anion, aminate, formylate, methanoate, hydrogen carboxylate, 71-47-6, CHEMBL183491, formiate, Fettsaeureanion, Formate ion, Fettsaeureanionen, Sodium; formate, a carboxyl group, fatty acid anions, MCFA anions, MCFA anion, acido graso anionico, Hydrogencarboxylic acid, anion de l'acide gras, medium-chain FA anion, acidos grasos anionicos, medium-chain FA anions, a long-chain carboxylate, a long-chain fatty acid, HCOO-, a short-chain fatty acid, 21:0 fatty acid anion, a medium chain fatty acid, 21:0 fatty acid anions, fatty acid anions 21:0, long-chain fatty acid anions, short-chain fatty acid anions, medium-chain fatty acid anions, AC1L18W4, GTPL4540, CHEBI:15740, CHEBI:28868, CHEBI:57560, CHEBI:58950, CHEBI:58951, CHEBI:59558, CHEBI:78892, CHEBI:78893, CTK5I5292, very long-chain fatty acid anions, BDAGIHXWWSANSR-UHFFFAOYSA-M, a very long-chain fatty acid anion, BDBM50155538, LS-190355', 'total' => '4', 'inchi' => 'InChI=1S/CH2O2/c2-1-3/h1H,(H,2,3)/p-1', 'inchikey' => 'BDAGIHXWWSANSR-UHFFFAOYSA-M', 'formula' => 'CHO2-', 'oxstate' => null, 'url' => '', 'charge' => '-1', 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-10-23 09:58:17', 'first' => 'F', 'nametotal' => 'Formate**4', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '02211', 'name' => 'Succinate', 'iupac_name' => 'butanedioate', 'casrn' => '110-15-6', 'synonyms' => '1,2-ethanedicarboxylic acid; Amber acid; asuccin; dihydrofumaric acid; Butanedioic acid; Butanedionic acid; katasuccin; Succinic acid; SUCCINIC ACID CRYSTALLINE; wormwood; wormwood acid', 'total' => '3', 'inchi' => 'InChI=1S/C4H6O4/c5-3(6)1-2-4(7)8/h1-2H2,(H,5,6)(H,7,8)/p-2', 'inchikey' => 'KDYFGRWQOYBRFD-UHFFFAOYSA-L', 'formula' => 'C4H5O4-', 'oxstate' => '', 'url' => '', 'charge' => '-2', 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-10-23 21:37:27', 'first' => 'S', 'nametotal' => 'Succinate**3', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '00393', 'name' => 'Benzoate', 'iupac_name' => 'benzoate', 'casrn' => '766-76-7', 'synonyms' => 'benzoate, benzoate anion, Phenylcarboxylate, Benzoic acid, ion(1-), Benzeneformate, Phenylformate, Tennplas, Benzenemethanoate, 766-76-7, Benzenecarboxylate, Retarded BA, benzoic acid-d5, Phenyl carboxylic acid, Oracyclic acid, benzoic acid anion, Benzene formic acid, AC1Q1HDY, AC1L18SS, AC1Q22CA, GTPL4565, BDBM36181, CHEBI:16150, CTK2H9612, WPYMKLBDIGXBTP-UHFFFAOYSA-M, AR-1H9057, ZINC00001011, NCGC00247905-01, CJ-00025, ZB000218, LS-190261, FT-0622772, FT-0622831, 3230-EP2269610A2, 3230-EP2269977A2, 3230-EP2269978A2, 3230-EP2269985A2, 3230-EP2269991A2, 3230-EP2269993A1, 3230-EP2270004A1, 3230-EP2270006A1, 3230-EP2270014A1, 3230-EP2272817A1, 3230-EP2272839A1, 3230-EP2272840A1, 3230-EP2272847A1, 3230-EP2272972A1, 3230-EP2272973A1, 3230-EP2274983A1, 3230-EP2275102A1, 3230-EP2275412A1, 3230-EP2275420A1, 3230-EP2275422A1, 3230-EP2277507A1, 3230-EP2277848A1, 3230-EP2277861A1, 3230-EP2277872A1, 3230-EP2277875A2, 3230-EP2277876A1, 3230-EP2279750A1, 3230-EP2280005A1, 3230-EP2280008A2, 3230-EP2280010A2, 3230-EP2281559A1, 3230-EP2281812A1, 3230-EP2281818A1, 3230-EP2281820A2, 3230-EP2284150A2, 3230-EP2284151A2, 3230-EP2284152A2, 3230-EP2284153A2, 3230-EP2284155A2, 3230-EP2284156A2, 3230-EP2284164A2, 3230-EP2284170A1, 3230-EP2284172A1, 3230-EP2284178A2, 3230-EP2284179A2, 3230-EP2286795A1, 3230-EP2286812A1, 3230-EP2287140A2, 3230-EP2287148A2, 3230-EP2287150A2, 3230-EP2289510A1, 3230-EP2289871A1, 3230-EP2289876A1, 3230-EP2289884A1, 3230-EP2289890A1, 3230-EP2289891A2, 3230-EP2292088A1, 3230-EP2292227A2, 3230-EP2292228A1, 3230-EP2292590A2, 3230-EP2292595A1, 3230-EP2292600A1, 3230-EP2292613A1, 3230-EP2292614A1, 3230-EP2292628A2, 3230-EP2295412A1, 3230-EP2295413A1, 3230-EP2295416A2, 3230-EP2295419A2, 3230-EP2295426A1, 3230-EP2295427A1, 3230-EP2295432A1, 3230-EP2295434A2, 3230-EP2295437A1, 3230-EP2295550A2, 3230-EP2298732A1, 3230-EP2298734A2, 3230-EP2298748A2, 3230-EP2298754A1, 3230-EP2298764A1, 3230-EP2298765A1, 3230-EP2298775A1, 3230-EP2298777A2, 3230-EP2298783A1, 3230-EP2301534A1, 3230-EP2301912A2, 3230-EP2301913A1, 3230-EP2301914A1, 3230-EP2301916A2, 3230-EP2301929A1, 3230-EP2301935A1, 3230-EP2305260A1, 3230-EP2305627A1, 3230-EP2305637A2, 3230-EP2305663A1, 3230-EP2305666A1, 3230-EP2305668A1, 3230-EP2305671A1, 3230-EP2305674A1, 3230-EP2305825A1, 3230-EP2308510A1, 3230-EP2308562A2, 3230-EP2308812A2, 3230-EP2308832A1, 3230-EP2308844A2, 3230-EP2308845A2, 3230-EP2308846A2, 3230-EP2308858A1, 3230-EP2308861A1, 3230-EP2308863A1, 3230-EP2308872A1, 3230-EP2308873A1, 3230-EP2308875A1, 3230-EP2308960A1, 3230-EP2311451A1, 3230-EP2311796A1, 3230-EP2311797A1, 3230-EP2311798A1, 3230-EP2311799A1, 3230-EP2311816A1, 3230-EP2311817A1, 3230-EP2311825A1, 3230-EP2311831A1, 3230-EP2311835A1, 3230-EP2311837A1, 3230-EP2311841A1, 3230-EP2311842A2, 3230-EP2314295A1, 3230-EP2314578A1, 3230-EP2314584A1, 3230-EP2314585A1, 3230-EP2316450A1, 3230-EP2316457A1, 3230-EP2316458A1, 3230-EP2316470A2, 3230-EP2316825A1, 3230-EP2316826A1, 3230-EP2316827A1, 3230-EP2316828A1, 3230-EP2316829A1, 3230-EP2316832A1, 3230-EP2316833A1, 3230-EP2316834A1, 3230-EP2316835A1, 3230-EP2316836A1, 3230-EP2371811A2, 3230-EP2372017A1, 3230-EP2374454A1, 3230-EP2377845A1', 'total' => '3', 'inchi' => 'InChI=1S/C7H6O2/c8-7(9)6-4-2-1-3-5-6/h1-5H,(H,8,9)/p-1', 'inchikey' => 'WPYMKLBDIGXBTP-UHFFFAOYSA-M', 'formula' => 'C7H5O2-', 'oxstate' => null, 'url' => '', 'charge' => '-1', 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-10-23 09:53:18', 'first' => 'B', 'nametotal' => 'Benzoate**3', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array() ) $i = (int) 8 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0021-9673(01)90743-5' $aus = 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.
Glycinate
Glutamate
Oxalate
Acetate ion
Lactate
Formate
Succinate
Benzoate
"Potentiometric Detection Of Aliphatic Amines By Flow Injection Analysis And Ion-interaction Chromatography With A Metallic Copper Electrode"
J. Chromatogr. A
1997 Volume 758, Issue 2 Pages 227-233
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]ZuLiang Chen* and Peter W. AlexanderCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '009252', 'citation_id' => '010213', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ) ) ), 'i' => (int) 9 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( 'id' => '009252', 'citation_id' => '010213', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00149', 'name' => 'Amines, aliphatic', 'iupac_name' => '', 'casrn' => '', 'synonyms' => '', 'total' => '10', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 09:53:17', 'first' => 'A', 'nametotal' => 'Amines, aliphatic**10', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array( (int) 0 => array( 'id' => '0086', 'type' => 'Manifold component', 'keyword' => 'Column', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '440', 'first' => 'C', 'keytotal' => 'Column**440', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '0258', 'type' => 'Chemometrics', 'keyword' => 'Method comparison', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '1232', 'first' => 'M', 'keytotal' => 'Method comparison**1232', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '0302', 'type' => 'Feature', 'keyword' => 'Optimization', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '1069', 'first' => 'O', 'keytotal' => 'Optimization**1069', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 9 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0021-9673(96)00741-8' $aus = 'ZuLiang Chen* and Peter W. Alexander'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.
Amines, aliphatic
Column
Method comparison
Optimization
"Ion Chromatography Of Inorganic Anions With Potentiometric Detection Using A Metallic Copper Electrode"
J. Chromatogr. A
1985 Volume 321, Issue 1 Pages 363-374
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]P. R. Haddad andP. W. Alexander, M. TrojanowiczCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( 'id' => '009380', 'citation_id' => '010276', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array() ), 'i' => (int) 10 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. 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Sulfate anion; Sulfuric acid, ion(2-); ', 'total' => '98', 'inchi' => 'InChI=1S/H2O4S/c1-5(2,3)4/h(H2,1,2,3,4)/p-2', 'inchikey' => 'QAOWNCQODCNURD-UHFFFAOYSA-L', 'formula' => 'O4S-2', 'oxstate' => '+6', 'url' => '', 'charge' => '-2', 'class1' => 'Inorganic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Anion', 'class5' => '', 'isgroup' => '', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 16:18:02', 'first' => 'S', 'nametotal' => 'Sulfate**98', 'AnalytesCitation' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '02325', 'name' => 'Thiocyanide', 'iupac_name' => 'thiocyanate', 'casrn' => '302-04-5', 'synonyms' => 'thiocyanate, Thiocyanate ion, Isothiocyanate, Thiocyanate ion (1-), Rhodanid, 302-04-5, hydrogen thiocyanate, Thiocyanate ion (2-), SCN, cyanosulfanide, sulphocyanate, thiocyanide, Thiozyanat, Thiocyanate anion, nitridothiocarbonate(IV), NCS-, nitridothiocarbonate(1-), AC1L1ST7, nitridosulfidocarbonate(1-), CHEMBL127789, SCN(-), BDBM26983, CHEBI:18022, CTK1C2556, SCN(-1), ZBKFYXZXZJPWNQ-UHFFFAOYSA-N, ZMZDMBWJUHKJPS-UHFFFAOYSA-M, N#C-S(-), [S-C#N](-), NCGC00248651-01, NCGC00248651-02, 71048-69-6', 'total' => '3', 'inchi' => 'InChI=1S/C2N2S/c3-1-5-2-4', 'inchikey' => 'ZMZDMBWJUHKJPS-UHFFFAOYSA-M', 'formula' => 'CNS-', 'oxstate' => null, 'url' => '', 'charge' => '-1', 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-10-23 21:38:17', 'first' => 'T', 'nametotal' => 'Thiocyanide**3', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array() ) $i = (int) 10 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0021-9673(01)90454-6' $aus = 'P. 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Abstract:
The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.
Bromide
Bromate
Chlorate ion
Chloride
Cyanide
Iodate
Iodide
Nitrate
Nitrite
Sulfate
Thiocyanide
"Electrocatalytic Oxidation Of Carbohydrates At Copper(II)-modified Electrodes And Its Application To Flow-through Detection"
J. Electroanal. Chem.
1994 Volume 372, Issue 1-2 Pages 137-143
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa UedaCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( 'id' => '009506', 'citation_id' => '010333', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ) ), 'Matrix' => array( (int) 0 => array( [maximum depth reached] ) ), 'Keyword' => array() ), 'i' => (int) 11 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( 'id' => '009506', 'citation_id' => '010333', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '00508', 'name' => 'Carbohydrates', 'iupac_name' => '', 'casrn' => 'NA', 'synonyms' => 'NA', 'total' => '46', 'inchi' => '', 'inchikey' => '', 'formula' => '', 'oxstate' => null, 'url' => '', 'charge' => null, 'class1' => 'Organic compound', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'Molecule', 'class5' => 'NA', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'C', 'nametotal' => 'Carbohydrates**46', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array( (int) 0 => array( 'id' => '0093', 'label' => 'Biological', 'level1' => 'Biological', 'level2' => '', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'total' => '116', 'url' => '', 'updated' => '2015-12-09 21:06:17', 'name' => 'Biological', 'nametotal' => 'Biological**116', 'first' => 'B', 'CitationsMatrix' => array( [maximum depth reached] ) ) ), 'Keyword' => array() ) $i = (int) 11 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/0022-0728(93)03252-K' $aus = 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.
Carbohydrates
Biological
"Arbutin Flow-Injection Analysis Using A Printed Circuit-Board Waste Modified Screen-Printed Electrode"
Bull. Chem. Soc. Jpn.
2005 Volume 78, Issue 5 Pages 864-866
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng HuangCode Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( 'id' => '011233', 'citation_id' => '016444', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array() ), 'i' => (int) 12 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 14 => array( 'id' => '014738', 'authors' => 'Fitsev, I.M.;Bakanina, Y.N.;Abdullin, I.F.;Budnikov, G.K.', 'authorsweb' => 'NA', 'title' => 'Flow injection determination of glucose in the blood serum', 'journal' => 'Zavod. Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. The limit of determination is 2 µg/mL.', 'language' => 'Russian', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '53', 'urlcheck' => '2007-04-02 12:04:13', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection determination of glucose in the blood serum', Zavod. Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 15 => array( 'id' => '014753', 'authors' => 'Mirkin, V.A.;Fenin, A.V.', 'authorsweb' => 'NA', 'title' => 'Use of a copper metal electrode in flow injection analysis', 'journal' => 'J. Anal. Chem.', 'journal_id' => '0798', 'fadid' => 'JACU1988V0043P01195', 'year' => '1988', 'volume' => '43', 'issue' => '7', 'startpage' => '1195', 'endpage' => '1198', 'type' => 'Journal Article', 'analytes' => ';0485;1412;0684;', 'matrices' => '', 'techniques' => ';0083;0400;', 'keywords' => ';0089;', 'abstract' => 'A Cu wire electrode (3 mm x 0.5 mm) was mounted perpendicular to the solution flow, and the potential of the electrode was measured vs. a Ag - AgCl electrode. Sample solution, containing Ca, Mg or Cu, was injected at a known rate into the supporting electrolyte (0.1 M KNO3), which contained EDTA (0.1M) for the determination of Ca or Mg, or EDTA, tartrate or oxalate ions (0.1M) for the determination of Cu. The electrode response was rectilinear for metal concentration. from 1 to 100 mM, provided that the solution contained dissolved O.', 'language' => 'Russian', 'updated' => '2020-12-28 11:11:09', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2006-05-20 19:29:53', 'urlcheckcode' => '', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'S. M. Kirov Kazakh State Univ., Alma-Ata USSR', 'email' => 'NA', 'notes' => 'Not available on springer', 'url' => 'NA', 'urltype' => 'NA', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Use of a copper metal electrode in flow injection analysis', J. Anal. Chem., 1988 43(7) 1195-1198', 'firstchar' => 'U', 'twochars' => 'Us', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( 'id' => '011233', 'citation_id' => '016444', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( 'id' => '02613', 'name' => 'Arbutin', 'iupac_name' => '(2R,3S,4S,5R,6S)-2-(hydroxymethyl)-6-(4-hydroxyphenoxy)oxane-3,4,5-triol', 'casrn' => '497-76-7', 'synonyms' => 'arbutin, 497-76-7, Uvasol, β-Arbutin, p-Arbutin, Ursin, 4-Hydroxyphenyl β-D-glucopyranoside, Arbutoside, Ursi, p-Hydroxyphenyl β-D-glucoside, p-Hydroxyphenyl β-D-glucopyranoside, Hydroquinone β-D-glucopyranoside, UNII-C5INA23HXF, Hydroquinone-O-β-D-glucopyranoside, 4-Hydroxyphenyl-β-D-glucopyranoside, CHEMBL232202, CHEBI:18305, Hydroquinone |A-D-glucopyranoside, hydroquinone O-β-D-glucopyranoside, 4-Hydroxyphenyl-β-D-glucopyranoside, DSSTox_CID_20152, DSSTox_RID_79450, DSSTox_GSID_40152, (2R,3S,4S,5R,6S)-2-(hydroxymethyl)-6-(4-hydroxyphenoxy)oxane-3,4,5-triol, (2R,3S,4S,5R,6S)-2-(hydroxymethyl)-6-(4-hydroxyphenoxy)tetrahydropyran-3,4,5-triol, CAS-497-76-7, Arbutine, Arbutyne, Hydroquinone-β-D-glucopyranoside, NSC 4036, Arbutin, Uva, Ursi, p-Arbutin, Hydroquinone |A-D-glucopyranoside, EINECS 207-850-3, BRN 0089673, NCGC00095599-01, S2263_Selleck, β-D-Glucopyranoside, 4-hydroxyphenyl, Spectrum_000786, SpecPlus_000314, Prestwick3_001026, Spectrum2_000662, Spectrum3_001233, Spectrum4_001474, Spectrum5_000147, C5INA23HXF, bmse000365, SCHEMBL36351, Arbutin - Uva - p-Arbutin, BSPBio_001211, BSPBio_002706, Hydroquinone-β-D-glucoside, KBioGR_002047, KBioSS_001266, SPECTRUM300539, MLS002207046, A4256_SIGMA, DivK1c_006410, SPBio_000723, AC1L9A87, BPBio1_001333, CCRIS 9273, MEGxp0_001504, HSDB 7661, KBio1_001354, KBio2_001266, KBio2_003834, KBio2_006402, KBio3_002206, BJRNKVDFDLYUGJ-RMPHRYRLSA-N, MolPort-001-742-322, HMS2098M13, HY-N0192, 4-Hydroxyphenyl-β-glucopyranoside, Tox21_111509, Tox21_302428, BDBM50219502, CA0139, CCG-38565, ZINC00518554, Arbutin-Supplied by Selleck Chemicals, AKOS015965305, Tox21_111509_1, CS-3084, KS-5252, RP29659, SDCCGMLS-0066538.P001, SMP1_000028, NCGC00166076-02, NCGC00166076-03, NCGC00166076-04, NCGC00166076-07, NCGC00255705-01, AC-20183, SMR001233417, TR-012619, A0522, AB00443586, N1714, ST50410373, A-9320, C06186, β-D-Glucopyranoside, 4-hydroxyphenyl- (9CI), 5-17-07-00110 (Beilstein Handbook Reference), Arbutin pound>>4-hydroxyphenyl-β-d-glucopyranosid, 4E19B706-2013-4401-A1FC-A154DADF42B4, (2R,3S,4S,5R,6S)-2-(hydroxymethyl)-6-(4-hydroxyphenoxy)tetrahydro-2H-pyran-3,4,5-triol, (2S,3R,4S,5S,6R)-2-(4-hydroxyphenoxy)-6-methylol-tetrahydropyran-3,4,5-triol, 30373-96-7, 39464-18-1, Uva', 'total' => '0', 'inchi' => 'InChI=1S/C12H16O7/c13-5-8-9(15)10(16)11(17)12(19-8)18-7-3-1-6(14)2-4-7/h1-4,8-17H,5H2', 'inchikey' => 'BJRNKVDFDLYUGJ-RMPHRYRLSA-N', 'formula' => 'C12H16O7', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => 'NA', 'class2' => 'NA', 'class3' => 'NA', 'class4' => 'NA', 'class5' => 'NA', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 16:36:07', 'first' => 'A', 'nametotal' => 'Arbutin**0', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array(), 'Keyword' => array() ) $i = (int) 12 $path = '' $a = '' $url = 'http://dx.doi.org/10.1246/bcsj.78.864' $aus = 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang'include - APP/View/Elements/citation.ctp, line 40 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::_renderElement() - CORE/Cake/View/View.php, line 1224 View::element() - CORE/Cake/View/View.php, line 418 include - APP/View/Techniques/view.ctp, line 52 View::_evaluate() - CORE/Cake/View/View.php, line 971 View::_render() - CORE/Cake/View/View.php, line 933 View::render() - CORE/Cake/View/View.php, line 473 Controller::render() - CORE/Cake/Controller/Controller.php, line 968 Dispatcher::_invoke() - CORE/Cake/Routing/Dispatcher.php, line 200 Dispatcher::dispatch() - CORE/Cake/Routing/Dispatcher.php, line 167 [main] - APP/webroot/index.php, line 109
Abstract:
A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.
Arbutin
"Reversed-phase HPLC Of Peptides With Tetraphenylporphyrin-based Stationary Phase And Potentiometric Detection With A Copper Electrode"
Chem. Anal.
1996 Volume 41, Issue 4 Pages 521-530
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.Code Context?><?phpif($uid!='') {$viewFile = '/home/stuchalk/public_html/fad/app/View/Elements/citation.ctp' $dataForView = array( 'data' => array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ), (int) 2 => array( [maximum depth reached] ), (int) 3 => array( [maximum depth reached] ), (int) 4 => array( [maximum depth reached] ), (int) 5 => array( [maximum depth reached] ), (int) 6 => array( [maximum depth reached] ), (int) 7 => array( [maximum depth reached] ), (int) 8 => array( [maximum depth reached] ), (int) 9 => array( [maximum depth reached] ), (int) 10 => array( [maximum depth reached] ), (int) 11 => array( [maximum depth reached] ), (int) 12 => array( [maximum depth reached] ), (int) 13 => array( [maximum depth reached] ), (int) 14 => array( [maximum depth reached] ), (int) 15 => array( [maximum depth reached] ) ) ), 'c' => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. Anal.', 'journal_id' => '0977', 'fadid' => 'CHAN1996V0041P00521', 'year' => '1996', 'volume' => '41', 'issue' => '4', 'startpage' => '521', 'endpage' => '530', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0038;0400;0083;', 'keywords' => '', 'abstract' => 'Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.', 'language' => 'English', 'updated' => '2015-10-26 09:47:56', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '0', 'urlcheck' => '2014-10-24 19:37:03', 'urlcheckcode' => 'HTTP/1.1 200 OK', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => 'Checked LL 06/28/98', 'url' => 'www.chem.uw.edu.pl/chemanal/PDFs/1996/CHAN1996V0041P00521.pdf', 'urltype' => 'pdfurl', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', Chem. Anal., 1996 41(4) 521-530', 'firstchar' => 'R', 'twochars' => 'Re', 'CitationsTechnique' => array( 'id' => '011684', 'citation_id' => '011800', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ), (int) 1 => array( [maximum depth reached] ) ), 'Matrix' => array(), 'Keyword' => array() ), 'i' => (int) 13 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. The protein was injected (injection volume 0.2 ml) into a carrier stream (1 mL min-1) of Cu(II) in 0.05 M phosphate buffer of pH 7.0; with 10 µM-Cu(II), proteins could be determined in the concentration. range 0.1 to 1 µM, the limits of detection for human albumin, bovine albumin, ovalbumin, phosvitin, human γ-globulin and catalase being 40, 90, 100, 30, 200 and 4 µg mL-1, respectively. Chloride only interferes when present at >0.01M, as compared with >10 µM in steady-state measurements. The system has been applied to proteins eluted from a size-exclusion column.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '4', 'urlcheck' => '2014-10-11 15:47:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)84974-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Indirect potentiometric monitoring of proteins with a copper electrode', Anal. Chim. Acta, 1985 173(1) 337-341', 'firstchar' => 'I', 'twochars' => 'In', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '006503', 'authors' => 'Kappes, T.;Hauser, P.C.', 'authorsweb' => 'Thomas Kappes and Peter C. Hauser*', 'title' => 'Potentiometric detection in capillary electrophoresis with a metallic copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1997V0354P00129', 'year' => '1997', 'volume' => '354', 'issue' => '1-3', 'startpage' => '129', 'endpage' => '134', 'type' => 'Journal Article', 'analytes' => ';0048;0245;0160;', 'matrices' => '', 'techniques' => ';0273;0173;0244;0001;0083;0400;', 'keywords' => ';0339;', 'abstract' => 'A copper metal electrode is used as potentiometric detector for capillary electrophoresis. The detector response is based on the complexation of copper ions at the electrode surface, which leads to a decrease of the electrode potential when the eluted analyte forms more stable copper complexes than the running buffer. A mixture of nine underivatized amino acids was separated within 7 min using basic carbonate and borate buffers as running electrolyte and detection was realised by potential measurement at a copper disk electrode in the wall-jet configuration. Calibration curves showed dynamic ranges of three orders of magnitude and detection limits of 5.9 x 10^-6 M for threonine and 3.2 x 10^-6 M for lysine. ', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-11 16:24:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01004', 'pauthor' => '!Hauser, P.C.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(97)00439-X', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection in capillary electrophoresis with a metallic copper electrode', Anal. Chim. Acta, 1997 354(1-3) 129-134', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '007049', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'Michael L. Hitchman and Frazier W. M. Nyasulu', 'title' => 'Potentiometric monitoring of proteins. 6. Indirect potentiometry', 'journal' => 'Talanta', 'journal_id' => '0569', 'fadid' => 'TALT1993V0040P01449', 'year' => '1993', 'volume' => '40', 'issue' => '9', 'startpage' => '1449', 'endpage' => '1459', 'type' => 'Journal Article', 'analytes' => ';2008;0160;', 'matrices' => '', 'techniques' => ';0400;0273;0083;0210;', 'keywords' => ';0302;0212;', 'abstract' => 'The indirect potentiometric determination of amino-acids and proteins with metal ions was used in both FIA and gel chromatography systems. In both applications a high purity Ag or Cu working electrode and double junction Ag/AgCl reference electrode was used with 0.5 M NaNO3 mobile phase (flow rate 23-60 ml/h) and 0.01-0.1 mM Cu2+. At 60 ml/min and 0.1 mM Cu2+ the calibration graph was rectilinear for 0.45 mM L-histidine and for 0.83 mM L-cysteine. This large linear range is explained in terms of a general model suggesting that a mechanism based on an electrode of the second kind was operating. The response indexes for a variety of proteins showed that the sensitivity was improved by lowering the mobile phase flow rate and by reducing the Cu2+ concentration.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '22', 'urlcheck' => '2014-10-11 15:00:57', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01199', 'pauthor' => '!Nyasulu, F.W.M.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0039-9140(93)80225-G', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric monitoring of proteins. 6. Indirect potentiometry', Talanta, 1993 40(9) 1449-1459', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 3 => array( 'id' => '007629', 'authors' => 'Fogg, A.G.;Scullion, S.P.;Edmonds, T.E.;Birch, B.J.', 'authorsweb' => 'Arnold G. Fogg, S. Paul Scullion, Tony E. Edmonds and Brian J. Birch', 'title' => 'Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', 'journal' => 'Analyst', 'journal_id' => '0864', 'fadid' => 'ANAL1991V0116P00573', 'year' => '1991', 'volume' => '116', 'issue' => '6', 'startpage' => '573', 'endpage' => '579', 'type' => 'Journal Article', 'analytes' => ';1588;', 'matrices' => '', 'techniques' => ';0001;0064;0083;0095;0512;0426;', 'keywords' => ';0387;0043;0110;', 'abstract' => 'A method has been developed for determining nitrate amperometrically by direct reduction at a freshly deposited copper electrode surface in a capillary-fill device (CFD). Copper(II) is added to the nitrate sample which is then taken up into the device. The potential of the screen-printed carbon electrode is held at -0.75 V versus the screen-printed silver reference electrode. At this potential, copper is plated onto the carbon electrode forming a freshly prepared copper electrode. At the same time dissolved oxygen is reduced. The potential is then scanned to more negative potentials and the signal at -0.90 V, due to the reduction of the nitrate, is measured. The method for determining nitrate given here is preliminary to the production of CFDs in which chemical reagents, copper sulphate and potassium hydrogen sulphate (used to produce the acidity), are screen-printed or otherwise coated onto the upper plate within the device.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '11', 'urlcheck' => '2014-10-12 02:13:46', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1039/an9911600573', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Direct reductive amperometric determination of nitrate at a copper electrode formed insitu in a capillary-fill sensor device', Analyst, 1991 116(6) 573-579', 'firstchar' => 'D', 'twochars' => 'Di', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 4 => array( 'id' => '008630', 'authors' => 'Luo, P.F.;Zhang, F.Z.;Baldwin, R.P.', 'authorsweb' => 'Peifang Luo, Fuzhen Zhang, and Richard P. Baldwin', 'title' => 'Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', 'journal' => 'Anal. Chem.', 'journal_id' => '0499', 'fadid' => 'ANCH1991V0063P01702', 'year' => '1991', 'volume' => '63', 'issue' => '17', 'startpage' => '1702', 'endpage' => '1707', 'type' => 'Journal Article', 'analytes' => ';0160;1751;', 'matrices' => '', 'techniques' => ';0001;0038;0054;0083;0400;', 'keywords' => '', 'abstract' => 'Electrochemical detection of amino-acids and peptides at a Cu electrode was evaluated as a means of detection of such compounds in flow injection analysis and HPLC. The optimum conditions for amperometric detection were an operating potential of +0.55 V vs. Ag - AgCl in 0.15 M NaOH as electrolyte. Detection limits for amino-acids were 1 to 50 pmol.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 18:36:27', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00855', 'pauthor' => '!Baldwin, R.P.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1021/ac00017a010', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Constant potential amperometric detection of underivatized amino-acids and peptides at a copper electrode', Anal. Chem., 1991 63(17) 1702-1707', 'firstchar' => 'C', 'twochars' => 'Co', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 5 => array( 'id' => '009556', 'authors' => 'Alexander, P.W.;Haddad, P.R.;Trojanowicz, M.A.', 'authorsweb' => 'NA', 'title' => 'Potentiometric flow injection determination of sugar using a metallic copper electrode', 'journal' => 'Anal. Lett.', 'journal_id' => '0820', 'fadid' => 'ANLE1985V0018P01953', 'year' => '1985', 'volume' => '18', 'issue' => '16', 'startpage' => '1953', 'endpage' => '1978', 'type' => 'Journal Article', 'analytes' => ';0508;1001;1057;1426;2186;', 'matrices' => '', 'techniques' => ';0030;0083;0400;', 'keywords' => ';0188;0339;', 'abstract' => 'The reducing sugar sample solution is injected into a water stream and reacted with a stream of carrier solution containing Cu(II) and NH3 or Na tartrate in a heated coil of PTFE tubing (70 to 250 cm x 0.5 mm). The reduction of the Cu(II) by the sugars is monitored at a copper electrode; sensitivity is highest at low flow rates (e.g., 1 mL min-1) and high temperature (e.g., 100°C). The method was also used in the analysis of 100 µL aliquots of a solution containing maltose, glucose, sorbose and fructose (25 mM each) by cation-exchange HPLC on Sugar-Pak I with water as mobile phase (0.3 mL min-1) and post-column derivatization with 0.5 mM CuSO4 and 50 mM NH3 at pH 10 (0.5 mL min-1).', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-29 16:54:24', 'hits' => '9', 'urlcheck' => '2014-10-12 00:06:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032718508067964', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric flow injection determination of sugar using a metallic copper electrode', Anal. Lett., 1985 18(16) 1953-1978', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 6 => array( 'id' => '009847', 'authors' => 'Zhou, J.X.;Wang, E.K.', 'authorsweb' => 'Jianxun Zhou, Erkang Wang', 'title' => 'Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', 'journal' => 'Electroanalysis', 'journal_id' => '1003', 'fadid' => 'ELAN1992V0004P00183', 'year' => '1992', 'volume' => '4', 'issue' => '2', 'startpage' => '183', 'endpage' => '189', 'type' => 'Journal Article', 'analytes' => ';0548;2086;1211;', 'matrices' => '', 'techniques' => ';0080;0083;0226;0001;', 'keywords' => ';0217;', 'abstract' => 'Directions are given for the preparation of a vitreous-C electrode coated with crystalline CuCl, which was used in the detection cell as the working electrode, together with an Ag - AgCl reference electrode and a Pt counter electrode. The detector was used for both flow injection analysis and HPLC, in both instances with a 10 µL injection of the sample and with 0.05 M phosphate buffer (pH 7) containing 5% of methanol and 25 mM EDTA as carrier or mobile phase. The HPLC was carried out on a column (20 cm x 4 mm) of Nucleosil C18 (7 µm). Reproducible cathodic current peaks were obtained for all three phenols at +0.1 V. However, at other potentials, anodic currents were observed; the potential used could be chosen to give either positive or negative peaks (assisting identification) or peaks of negligibly small height (eliminating interference). At +0.1 V, calibration graphs were rectilinear for 2 to 1000, 5 to 600 and 5 to 800 ng injected for quinol, resorcinol and catechol, respectively, with corresponding detection limits of 1, 3 and 2 ng.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '8', 'urlcheck' => '2014-10-11 14:08:45', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01388', 'pauthor' => '!Wang, E.K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1002/elan.1140040208', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Liquid chromatography - amperometric detection of catechol, resorcinol, and hydroquinone with a copper-based chemically modified electrode', Electroanalysis, 1992 4(2) 183-189', 'firstchar' => 'L', 'twochars' => 'Li', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 7 => array( 'id' => '010031', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0294P00397', 'year' => '1984', 'volume' => '294', 'issue' => '1', 'startpage' => '397', 'endpage' => '402', 'type' => 'Journal Article', 'analytes' => ';0362;0485;1412;2206;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic Cu electrode for potentiometric detection of alkaline earth metals after their separation by ion chromatography was studied. The effects of ligands (e.g. citrate and tartrate) present in the test solution, and of other eluent parameters on the electrode potential were studied. The calibration curves were linear in the range 0-40 ppm by using 1 mM tartrate and 1 mM diethylenetriamine as the eluent.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '24', 'urlcheck' => '2014-10-11 19:03:56', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)96151-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of magnesium, calcium, strontium and barium ions using a metallic copper electrode as a potentiometric detector', J. Chromatogr. A, 1984 294(1) 397-402', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 8 => array( 'id' => '010039', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad, P. W. Alexander, and M. Trojanowicz', 'title' => 'High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1984V0315P00261', 'year' => '1984', 'volume' => '315', 'issue' => '1', 'startpage' => '261', 'endpage' => '270', 'type' => 'Journal Article', 'analytes' => ';1105;1081;1688;0005;1335;0995;2211;0393;', 'matrices' => '', 'techniques' => ';0083;0030;0273;0400;', 'keywords' => '', 'abstract' => 'The use of a metallic copper wire electrode for potentiometric detection of organic acid anions in ion-exchange chromatography is described. These anions were detected by changes in electrode potential resulting from complexation of copper(I) or copper(II) ions at the electrode surface. The direction of this potential change, and hence the direction of the peak produced, was found to depend on the relative strengths of copper complexation between the injected ligand and the eluent ligand. Calibration relationships between the electrode potential and the amount of injected solute were studied and were observed to depend on the type of solute and the amounts injected. Several separations obtained using the copper wire electrode detector are presented as examples. Included are separations of glycinate, glutamate, and oxalate, and of acetate, lactate, formate, succinate, and benzoate.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '18', 'urlcheck' => '2014-10-11 19:04:08', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90743-5', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''High performance liquid chromatography of organic acids with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1984 315(1) 261-270', 'firstchar' => 'H', 'twochars' => 'Hi', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 9 => array( 'id' => '010213', 'authors' => 'Chen, Z.L.;Alexander, P.W.', 'authorsweb' => 'ZuLiang Chen* and Peter W. Alexander', 'title' => 'Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1997V0758P00227', 'year' => '1997', 'volume' => '758', 'issue' => '2', 'startpage' => '227', 'endpage' => '233', 'type' => 'Journal Article', 'analytes' => ';0149;', 'matrices' => '', 'techniques' => ';0040;0400;0083;', 'keywords' => ';0086;0258;0302;', 'abstract' => 'The use of a metallic copper wire electrode for the detection of amines using FIA with octylammonium salicylate was studied. Effects on response by parameters such as, carrier pH, concentration of the ion-interaction reagent and injection volume were investigated. The electrode was applied to the determination of amines after ion-interaction chromatography on a Brownlee C18 column (10 cm x 4.6 mm) with 0.3 mM octylammonium salicylate/H2O of pH 6 as the mobile phase at a flow rate of 0.3 ml/min. Detection limits were from 0.5-1 nmol. Comparable results were obtained with UV detection.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '14', 'urlcheck' => '2014-10-11 19:08:38', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00742', 'pauthor' => '!Chen, Z.L.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(96)00741-8', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Potentiometric detection of aliphatic amines by flow injection analysis and ion-interaction chromatography with a metallic copper electrode', J. Chromatogr. A, 1997 758(2) 227-233', 'firstchar' => 'P', 'twochars' => 'Po', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 10 => array( 'id' => '010276', 'authors' => 'Haddad, P.R.;Alexander, P.W.;Trojanowicz, M.A.', 'authorsweb' => 'P. R. Haddad andP. W. Alexander, M. Trojanowicz', 'title' => 'Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', 'journal' => 'J. Chromatogr. A', 'journal_id' => '0619', 'fadid' => 'JCRA1985V0321P00363', 'year' => '1985', 'volume' => '321', 'issue' => '1', 'startpage' => '363', 'endpage' => '374', 'type' => 'Journal Article', 'analytes' => ';0451;0447;0590;0594;0716;1274;1275;1588;1592;2234;2325;', 'matrices' => '', 'techniques' => ';0030;0083;0273;0400;', 'keywords' => '', 'abstract' => 'The determination of inorganic anions by ion chromatography with potentiometric detection using a metallic copper indicator electrode is described. The electrode response to inorganic anions can result from consumption of cuprous and cupric ions in the diffusion layer at the electrode surface, from production of copper ions due to oxidation of metallic copper, or as a result of displacement of a copper-complexing ligand from the eluent by an eluted non-complexing inorganic anion. The first possibility is exemplified by the determination of cyanide, chloride, bromide, iodide and thiocyanate, whereas the second possibility is illustrated by the determination of iodate, bromate and chlorate. An example of the indirect detection method is the determination of nitrite, nitrate and sulphate, using sodium tartrate as eluent. Calibration data for all of the above detection methods are provided and are interpreted in terms of theoretical response equations. Detection limits are also presented and are shown to be strongly dependent on the chromatographic conditions used and on the electrode response mechanism applicable to each anion.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '31', 'urlcheck' => '2014-10-11 19:04:17', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00320', 'pauthor' => '!Trojanowicz, M.A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0021-9673(01)90454-6', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Ion chromatography of inorganic anions with potentiometric detection using a metallic copper electrode', J. Chromatogr. A, 1985 321(1) 363-374', 'firstchar' => 'I', 'twochars' => 'Io', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 11 => array( 'id' => '010333', 'authors' => 'Kano, K.;Torimura, M.;Esaka, Y.;Goto, M.;Ueda, T.', 'authorsweb' => 'Kenji Kano*, Masaki Torimura, Yukihiro Esaka and Masashi Goto, Teruhisa Ueda', 'title' => 'Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1994V0372P00137', 'year' => '1994', 'volume' => '372', 'issue' => '1-2', 'startpage' => '137', 'endpage' => '143', 'type' => 'Journal Article', 'analytes' => ';0508;', 'matrices' => ';0093;', 'techniques' => ';0083;0519;0038;', 'keywords' => '', 'abstract' => 'An untreated polished Cu-disc electrode gave no response to carbohydrates in cyclic voltammetry, but an electrode that had been electrolysed at 2 V in 75 mM NaOH showed a well-defined anodic response to glucose in 0.15 M NaOH. Studies with impregnated carbon-paste electrodes showed that the presence of CuO is essential for the electro-oxidation of carbohydrates. CZE was used to determine the formate produced by oxidation of glucitol, on the basis of which a scheme for the electro-oxidation of glucose is proposed that tentatively involves a Cu(III) oxide formed in situ. A CuO-impregnated carbon-paste electrode at 0.45 V was used in FIA; peak heights relative to that for glucose ranged from 1.46 for mannitol to 0.54 for raffinose. When such an electrode was used in the anion-exchange HPLC of carbohydrates, the peak height for glucose varied linearly for 10^-1000 pmol and the detection limit was 3 pmol. The RSD (n = 10) at 100 pmol was 1.79%, but the poor day-to-day reproducibility precluded the present practical applicability of the method.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '10', 'urlcheck' => '2014-10-12 09:04:47', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00221', 'pauthor' => '!Kano, K.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/0022-0728(93)03252-K', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Electrocatalytic oxidation of carbohydrates at copper(II)-modified electrodes and its application to flow-through detection', J. Electroanal. Chem., 1994 372(1-2) 137-143', 'firstchar' => 'E', 'twochars' => 'El', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array([maximum depth reached]) ), (int) 12 => array( 'id' => '016444', 'authors' => 'Shih, Y.;Zen, J.M.;Kumar, A.S.;Huang, Y.N.', 'authorsweb' => 'Ying Shih, Jyh-Myng Zen, Annamalai Senthil Kumar and Yu-Neng Huang', 'title' => 'Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', 'journal' => 'Bull. Chem. Soc. Jpn.', 'journal_id' => '0540', 'fadid' => 'BCSJ2005V0078P00864', 'year' => '2005', 'volume' => '78', 'issue' => '5', 'startpage' => '864', 'endpage' => '866', 'type' => 'Journal Article', 'analytes' => ';2613;', 'matrices' => '', 'techniques' => ';0083;0209;', 'keywords' => '', 'abstract' => 'A copper-metal enriched printed-circuit board waste modified screen-printed electrode has been demonstrated for the sensitive electroanalysis of a tyrosinase biosynthesis-inhibiting cosmetic agent, arbutin by flow-injection analysis.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'No', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-12 17:34:13', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => null, 'pauthor' => 'NA', 'address' => 'NA', 'email' => 'NA', 'notes' => null, 'url' => '10.1246/bcsj.78.864', 'urltype' => 'doi', 'gotpdf' => 'no', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Arbutin Flow-Injection Analysis Using a Printed Circuit-Board Waste Modified Screen-Printed Electrode', Bull. Chem. Soc. Jpn., 2005 78(5) 864-866', 'firstchar' => 'A', 'twochars' => 'Ar', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array([maximum depth reached]) ), (int) 13 => array( 'id' => '011800', 'authors' => 'Trojanowicz, M.A.;Martin, G.B.;Meyerhoff, M.E.', 'authorsweb' => 'NA', 'title' => 'Reversed-phase HPLC of peptides with tetraphenylporphyrin-based stationary phase and potentiometric detection with a copper electrode', 'journal' => 'Chem. 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Abstract:
Amino-acids (histidine, phenylalanine, glycine) and peptides (e.g. histidine-glycine, glycine-glycine-histidine) were separated on a column packed with an immobilized metalloporphyrin-based stationary phase prepared by derivatization of silica with [5-(p-carboxyphenyl)-10,15,20-triphenyl]porphyrin and reaction with Zn(II) [cf. Kibbey and Meyerhoff, Anal. Chem., 1993, 65, 2189]. A 50 mM phosphate buffer of pH 7 containing 0.5-1% acetonitrile or 19% propan-2-ol and 1% acetonitrile was used as mobile phase (1 ml/min). Detection was by potentiometry using a Cu disc electrode (1.6 mm diameter) in a large-volume wall-jet flow cell arrangement (cf. Fresenius' J. Anal. Chem., 1987, 328, 653). The detection was studied by FIA using 50 mM phosphate buffer of pH 7/propan-2-ol (4:1) as carrier (1 ml/min); detection limits for glycine, phenylalanine and histidine were 100, 100 and 10 µM, respectively. No calibration data or RSD are given. The retention mechanism is discussed.
Amino Acids
Peptides
"Flow Injection Determination Of Glucose In The Blood Serum"
Zavod. Lab.
1998 Volume 64, Issue 7 Pages 6-8
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Lab.', 'journal_id' => '0770', 'fadid' => 'ZSLB1998V0064P00006', 'year' => '1998', 'volume' => '64', 'issue' => '7', 'startpage' => '6', 'endpage' => '8', 'type' => 'Journal Article', 'analytes' => ';1057;', 'matrices' => ';0116;', 'techniques' => ';0512;0083;', 'keywords' => ';0212;', 'abstract' => 'A possibility of flow injection voltammetric determination of glucose in the blood serum using a catalytic current resulted from Fehling reagent formation at the Cu electrode is shown. An anal. FIA signal is proportional to the glucose concentration. within the range of 1.cntdot.104 1.cntdot.103M, productivity of the FIA system is 50 samples per h. 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Lab., 1998 64(7) 6-8', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( 'id' => '015539', 'citation_id' => '014738', 'technique_id' => '0083' ), 'Analyte' => array( (int) 0 => array( [maximum depth reached] ) ), 'Matrix' => array( (int) 0 => array( [maximum depth reached] ) ), 'Keyword' => array( (int) 0 => array( [maximum depth reached] ) ) ), 'i' => (int) 14 ) $data = array( 'Technique' => array( 'id' => '0083', 'label' => 'Electrode', 'level1' => 'Electrode', 'level2' => 'copper', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'champ' => '', 'total' => '16', 'updated' => '0000-00-00 00:00:00', 'name' => 'Electrode, copper', 'nametotal' => 'Electrode, copper**16', 'first' => 'E' ), 'Citation' => array( (int) 0 => array( 'id' => '004761', 'authors' => 'Hitchman, M.L.;Nyasulu, F.W.M.', 'authorsweb' => 'M. L. Hitchman and F. W. M. Nyasulu', 'title' => 'Indirect potentiometric monitoring of proteins with a copper electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1985V0173P00337', 'year' => '1985', 'volume' => '173', 'issue' => '1', 'startpage' => '337', 'endpage' => '341', 'type' => 'Journal Article', 'analytes' => ';2008;1687;1890;0544;1042;0092;', 'matrices' => ';0101;', 'techniques' => ';0044;0083;0400;', 'keywords' => ';0217;0212;', 'abstract' => 'The electrode was a 0.25-mm diameter copper wire with only the tip exposed; it was mounted in a flow-cell that incorporated a double-junction silver - AgCl reference electrode and also a platinum-wire auxiliary electrode for cathodic pre-cleaning of the copper electrode. 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