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
Amperometry
Citations 3
"Anodic Amperometry And Kinetics Of 2 To 4-carbon Glycols At The Nickel Electrode"
Anal. Chim. Acta
1988 Volume 208, Issue 1-2 Pages 247-254
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Nader Botros and Calvin O. HuberCode Context?>
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Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1988V0208P00247', 'year' => '1988', 'volume' => '208', 'issue' => '1-2', 'startpage' => '247', 'endpage' => '254', 'type' => 'Journal Article', 'analytes' => ';0105;0106;0469;1976;1975;0818;0929;1103;', 'matrices' => '', 'techniques' => ';0003;0186;', 'keywords' => ';0043;0230;0401;', 'abstract' => 'Anodic amperometry of nine C3 and C4 alcohols and diols, plus ethanediol and glycerol, was studied at +0.55 V (vs. the SCE) in 0.1 M NaOH containing suspended Ni(OH)2 (from adding 10 mM NiSO4). The flow injection cell contained a 10-mm Ni-wire (0.64 mm diameter) working electrode and a 20-mm Pt-wire auxiliary electrode. The upper limit of rectilinearity (peak current vs. concentration.) was ~0.25 mM and the lower detection limit was 0.2 µM (propane-1,3-diol). Primary alcohols yielded larger current sensitivities than secondary alcohols.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 15:54:06', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01023', 'pauthor' => '!Huber, C.O.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)80752-7', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Anodic amperometry and kinetics of 2 to 4-carbon glycols at the nickel electrode', Anal. Chim. 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Huber', 'title' => 'Anodic amperometry and kinetics of 2 to 4-carbon glycols at the nickel electrode', 'journal' => 'Anal. Chim. Acta', 'journal_id' => '0584', 'fadid' => 'ANCA1988V0208P00247', 'year' => '1988', 'volume' => '208', 'issue' => '1-2', 'startpage' => '247', 'endpage' => '254', 'type' => 'Journal Article', 'analytes' => ';0105;0106;0469;1976;1975;0818;0929;1103;', 'matrices' => '', 'techniques' => ';0003;0186;', 'keywords' => ';0043;0230;0401;', 'abstract' => 'Anodic amperometry of nine C3 and C4 alcohols and diols, plus ethanediol and glycerol, was studied at +0.55 V (vs. the SCE) in 0.1 M NaOH containing suspended Ni(OH)2 (from adding 10 mM NiSO4). The flow injection cell contained a 10-mm Ni-wire (0.64 mm diameter) working electrode and a 20-mm Pt-wire auxiliary electrode. The upper limit of rectilinearity (peak current vs. concentration.) was ~0.25 mM and the lower detection limit was 0.2 µM (propane-1,3-diol). 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Acta, 1988 208(1-2) 247-254', 'firstchar' => 'A', 'twochars' => 'An', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '010342', 'authors' => 'Hedenmo, M.;Narvaez, A.;Dominguez, E.;Katakis, I.', 'authorsweb' => 'Maria Hedenmo, Arántzazu Narváez, Elena Domínguez* and Ioanis Katakis', 'title' => 'Improved mediated tyrosinase amperometric enzyme electrodes', 'journal' => 'J. Electroanal. Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1997V0425P00001', 'year' => '1997', 'volume' => '425', 'issue' => '1-2', 'startpage' => '1', 'endpage' => '11', 'type' => 'Journal Article', 'analytes' => ';1788;0548;', 'matrices' => '', 'techniques' => ';0003;0073;', 'keywords' => ';0109;0147;0258;', 'abstract' => 'The electroreduction of the quinonoid products of the oxidation of phenols by monophenol monooxygenase in carbon-paste electrodes to two-electron-donating phenolic species in order to regenerate the active (oxy-) form of the enzyme in the presence of O2 has been made more efficient by the incorporation of bis-(4,4'-dimethyl-2,2'-bipyridyl)(1,10-phenanthroline-5,6-dione)osmium chloride as mediator in the carbon paste. The reduction-current response was thereby rendered mass-transport-limited. Both batch cyclic-voltammetric and flow injection experiments are described. Under flow injection conditions the presence of the mediator increased the current density threefold, decreased the detection limit by nearly two orders of magnitude, and increased the lifetime by more than one order of magnitude. For injection of a 20 µL sample into a carrier stream of 0.25 M phosphate buffer of pH 6.0 (0.7 ml/min) with the electrode maintained at -0.5 V vs. Ag/AgCl, the detection limits for phenol and catechol were both 10 nM, as compared with 500 nM and 250 nM, respectively, in the absence of the mediator.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-12 09:49:23', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00555', 'pauthor' => '!Dominguez, E.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0022-0728(96)04966-2', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Improved mediated tyrosinase amperometric enzyme electrodes', J. Electroanal. Chem., 1997 425(1-2) 1-11', 'firstchar' => 'I', 'twochars' => 'Im', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '010442', 'authors' => 'Fernandez Abedul, M.T.;Costa Garcia, A.', 'authorsweb' => 'M. T. Fernández-Abedul and A. Costa-Garcia*', 'title' => 'Flow injection analysis with amperometric detection of naltrexone in pharmaceuticals', 'journal' => 'J. Pharm. Biomed. Anal.', 'journal_id' => '0632', 'fadid' => 'JPBA1997V0016P00015', 'year' => '1997', 'volume' => '16', 'issue' => '1', 'startpage' => '15', 'endpage' => '19', 'type' => 'Journal Article', 'analytes' => ';1552;', 'matrices' => ';0833;', 'techniques' => ';0003;0073;', 'keywords' => ';0109;0244;0258;', 'abstract' => 'Flow injection analysis (FIA) with amperometric detection using a carbon paste electrode is applied to the determination of naltrexone. The sample solution was injected into the carrier stream of 0.1 M perchloric acid, being determined by oxidation at +1.0 V vs. Ag/AgCl/sat. KCl using a flow rate of 4 mL min-1. A relative standard deviation of 1.5% was calculated for a concentration level of 10^-5 M (n = 17) without carrying out a carbon paste electrode pretreatment. Calibration curves were found to be linear between 2 x 10^-8 and 10^-5 M (almost three orders of magnitude) and the method has a detection limit of 2 x 10^-8 M. A simple and reproducible procedure is proposed for the determination of naltrexone in pharmaceuticals. The results compared favourably with those obtained by an HPLC-UV 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 09:50:03', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00094', 'pauthor' => '!Costa Garcia, A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0731-7085(96)01962-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection analysis with amperometric detection of naltrexone in pharmaceuticals', J. Pharm. Biomed. Anal., 1997 16(1) 15-19', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array( [maximum depth reached] ), 'Keyword' => array( [maximum depth reached] ) ) ) ) $c = array( 'id' => '005079', 'authors' => 'Botros, N.;Huber, C.O.', 'authorsweb' => 'Nader Botros and Calvin O. Huber', 'title' => 'Anodic amperometry and kinetics of 2 to 4-carbon glycols at the nickel electrode', 'journal' => 'Anal. Chim. 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"Improved Mediated Tyrosinase Amperometric Enzyme Electrodes"
J. Electroanal. Chem.
1997 Volume 425, Issue 1-2 Pages 1-11
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]Maria Hedenmo, Arántzazu Narváez, Elena Domínguez* and Ioanis KatakisCode Context?>
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Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1997V0425P00001', 'year' => '1997', 'volume' => '425', 'issue' => '1-2', 'startpage' => '1', 'endpage' => '11', 'type' => 'Journal Article', 'analytes' => ';1788;0548;', 'matrices' => '', 'techniques' => ';0003;0073;', 'keywords' => ';0109;0147;0258;', 'abstract' => 'The electroreduction of the quinonoid products of the oxidation of phenols by monophenol monooxygenase in carbon-paste electrodes to two-electron-donating phenolic species in order to regenerate the active (oxy-) form of the enzyme in the presence of O2 has been made more efficient by the incorporation of bis-(4,4'-dimethyl-2,2'-bipyridyl)(1,10-phenanthroline-5,6-dione)osmium chloride as mediator in the carbon paste. The reduction-current response was thereby rendered mass-transport-limited. Both batch cyclic-voltammetric and flow injection experiments are described. 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Primary alcohols yielded larger current sensitivities than secondary alcohols.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '1', 'urlcheck' => '2014-10-11 15:54:06', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '01023', 'pauthor' => '!Huber, C.O.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)80752-7', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Anodic amperometry and kinetics of 2 to 4-carbon glycols at the nickel electrode', Anal. Chim. 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Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1997V0425P00001', 'year' => '1997', 'volume' => '425', 'issue' => '1-2', 'startpage' => '1', 'endpage' => '11', 'type' => 'Journal Article', 'analytes' => ';1788;0548;', 'matrices' => '', 'techniques' => ';0003;0073;', 'keywords' => ';0109;0147;0258;', 'abstract' => 'The electroreduction of the quinonoid products of the oxidation of phenols by monophenol monooxygenase in carbon-paste electrodes to two-electron-donating phenolic species in order to regenerate the active (oxy-) form of the enzyme in the presence of O2 has been made more efficient by the incorporation of bis-(4,4'-dimethyl-2,2'-bipyridyl)(1,10-phenanthroline-5,6-dione)osmium chloride as mediator in the carbon paste. The reduction-current response was thereby rendered mass-transport-limited. Both batch cyclic-voltammetric and flow injection experiments are described. Under flow injection conditions the presence of the mediator increased the current density threefold, decreased the detection limit by nearly two orders of magnitude, and increased the lifetime by more than one order of magnitude. For injection of a 20 µL sample into a carrier stream of 0.25 M phosphate buffer of pH 6.0 (0.7 ml/min) with the electrode maintained at -0.5 V vs. Ag/AgCl, the detection limits for phenol and catechol were both 10 nM, as compared with 500 nM and 250 nM, respectively, in the absence of the mediator.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '6', 'urlcheck' => '2014-10-12 09:49:23', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00555', 'pauthor' => '!Dominguez, E.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0022-0728(96)04966-2', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Improved mediated tyrosinase amperometric enzyme electrodes', J. Electroanal. Chem., 1997 425(1-2) 1-11', 'firstchar' => 'I', 'twochars' => 'Im', 'CitationsTechnique' => array( [maximum depth reached] ), 'Analyte' => array( [maximum depth reached] ), 'Matrix' => array([maximum depth reached]), 'Keyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '010442', 'authors' => 'Fernandez Abedul, M.T.;Costa Garcia, A.', 'authorsweb' => 'M. T. Fernández-Abedul and A. Costa-Garcia*', 'title' => 'Flow injection analysis with amperometric detection of naltrexone in pharmaceuticals', 'journal' => 'J. Pharm. Biomed. Anal.', 'journal_id' => '0632', 'fadid' => 'JPBA1997V0016P00015', 'year' => '1997', 'volume' => '16', 'issue' => '1', 'startpage' => '15', 'endpage' => '19', 'type' => 'Journal Article', 'analytes' => ';1552;', 'matrices' => ';0833;', 'techniques' => ';0003;0073;', 'keywords' => ';0109;0244;0258;', 'abstract' => 'Flow injection analysis (FIA) with amperometric detection using a carbon paste electrode is applied to the determination of naltrexone. The sample solution was injected into the carrier stream of 0.1 M perchloric acid, being determined by oxidation at +1.0 V vs. Ag/AgCl/sat. KCl using a flow rate of 4 mL min-1. A relative standard deviation of 1.5% was calculated for a concentration level of 10^-5 M (n = 17) without carrying out a carbon paste electrode pretreatment. Calibration curves were found to be linear between 2 x 10^-8 and 10^-5 M (almost three orders of magnitude) and the method has a detection limit of 2 x 10^-8 M. A simple and reproducible procedure is proposed for the determination of naltrexone in pharmaceuticals. The results compared favourably with those obtained by an HPLC-UV 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 09:50:03', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00094', 'pauthor' => '!Costa Garcia, A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0731-7085(96)01962-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection analysis with amperometric detection of naltrexone in pharmaceuticals', J. Pharm. Biomed. 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"Flow Injection Analysis With Amperometric Detection Of Naltrexone In Pharmaceuticals"
J. Pharm. Biomed. Anal.
1997 Volume 16, Issue 1 Pages 15-19
Notice (8): Undefined variable: uid [APP/View/Elements/citation.ctp, line 40]M. T. Fernández-Abedul and A. Costa-Garcia*Code Context?>
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Chem.', 'journal_id' => '0709', 'fadid' => 'JECH1997V0425P00001', 'year' => '1997', 'volume' => '425', 'issue' => '1-2', 'startpage' => '1', 'endpage' => '11', 'type' => 'Journal Article', 'analytes' => ';1788;0548;', 'matrices' => '', 'techniques' => ';0003;0073;', 'keywords' => ';0109;0147;0258;', 'abstract' => 'The electroreduction of the quinonoid products of the oxidation of phenols by monophenol monooxygenase in carbon-paste electrodes to two-electron-donating phenolic species in order to regenerate the active (oxy-) form of the enzyme in the presence of O2 has been made more efficient by the incorporation of bis-(4,4'-dimethyl-2,2'-bipyridyl)(1,10-phenanthroline-5,6-dione)osmium chloride as mediator in the carbon paste. The reduction-current response was thereby rendered mass-transport-limited. Both batch cyclic-voltammetric and flow injection experiments are described. 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The results compared favourably with those obtained by an HPLC-UV 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 09:50:03', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00094', 'pauthor' => '!Costa Garcia, A.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0731-7085(96)01962-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Flow injection analysis with amperometric detection of naltrexone in pharmaceuticals', J. Pharm. Biomed. Anal., 1997 16(1) 15-19', 'firstchar' => 'F', 'twochars' => 'Fl', 'CitationsTechnique' => array( 'id' => '009706', 'citation_id' => '010442', 'technique_id' => '0003' ), 'Analyte' => array( (int) 0 => array( 'id' => '01552', 'name' => 'Naltrexone', 'iupac_name' => '(4R,4aS,7aR,12bS)-3-(cyclopropylmethyl)-4a,9-dihydroxy-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-7-one', 'casrn' => '16590-41-3', 'synonyms' => 'naltrexone, Celupan, Vivitrex, ReVia, Vivitrol, Depade, 16590-41-3, Naltrexonum, Naltrexona, N-Cyclopropylmethylnoroxymorphone, Naltrexonum [INN-Latin], Naltrexona [INN-Spanish], MorViva, UNII-5S6W795CQM, Vivitrol (TN), Naltrexone hydrochloride, naltrexone (ReVia), Nemexin, CCRIS 3506, CHEBI:7465, HSDB 6750, EN-1639A, N-Cyclopropylmethyl-14-hydroxydihydromorphinone, Naltrexone (USAN/INN), Prestwick0_000116, Prestwick1_000116, Prestwick2_000116, Prestwick3_000116, EINECS 240-649-9, UM-792, HS-0002, BRN 3596648, BSPBio_000132, BIDD:GT0405, Naltrexone [USAN:BAN:INN], Naltrexone [USAN:INN:BAN], SPBio_002071, BPBio1_000146, 17-(Cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxymorphinan-6-one, PTI-555, HMS2089O11, Morphinan-6-one, 17-(cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxy-, (5alpha)-, PDSP2_000847, DB00704, SMP1_000206, LS-92094, 17-(Cyclopropylmethyl)-4,5α-epoxy-3,14-dihydroxymorphinan-6-one, C07253, D05113, Morphinan-6-one, 17-(cyclopropylmethyl)-4,5-α-epoxy-3,14-dihydroxy-, DSSTox_CID_26313, DSSTox_RID_81532, DSSTox_GSID_46313, BRD-K88172511-310-03-8, MLS000069607, MLS002153483, 3,14-dihydroxy-17-(cyclopropylmethyl)-4,5α-epoxymorphinan-6-one, 17-(Cyclopropylmethyl)-4,5-epoxy-3,14-dihydroxmorphinan-6-one, (5α)-, Naltrexone base anhydrous, CAS-16590-41-3, 16676-29-2, SMR000058767, Naltrekson, Abernil, Adepend, Antaxon, Dependex, Nalerona, Naltrexon, Narcoral, Opizone, Naltax, Arrop, Neksi, Revez, ReViareg, NCGC00162274-02, CID5360515, PubChem24168, CHEMBL142, SCHEMBL34681, CHEMBL19019, 5S6W795CQM, GTPL1639, BDBM60212, cid_5485201, CHEBI:121459, DQCKKXVULJGBQN-XFWGSAIBSA-N, MolPort-004-920-221, cyclopropylmethyl(dihydroxy)[?]one, Tox21_112007, BDBM50000787, DAP000379, AKOS015994596, Tox21_112007_1, CS-0880, EN-1639A [AS HYDROCHLORIDE], MCULE-7032963403, NCGC00024427-03, NCGC00024427-04, NCGC00024427-05, AN-12941, HY-76711, W-5099, 88088-EP2270005A1, 88088-EP2275420A1, 88088-EP2298761A1, 88088-EP2298776A1, 88088-EP2305648A1, AB00174152-14, (1S,5R,13R,17S)-4-(cyclopropylmethyl)-10,17-dihydroxy-12-oxa-4-azapentacyclo[9.6.1.0;{1,13}.0;{5,17}.0;{7,18}]octadeca-7,9,11(18)-trien-14-one, (1S,5R,13R,17S)-4-(cyclopropylmethyl)-10,17-dihydroxy-12-oxa-4-azapentacyclo[9.6.1.0^{1,13}.0^{5,17}.0^{7,18}]octadeca-7(18),8,10-trien-14-one, (4R,4aS,7aR,12bS)-3-(cyclopropylmethyl)-4a,9-bis(oxidanyl)-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-7-one;hydrochloride, (4R,4aS,7aR,12bS)-3-(cyclopropylmethyl)-4a,9-dihydroxy-2,4,5,6,7a,13-hexahydro-1H-4,12-methanobenzofuro[3,2-e]isoquinoline-7-one;hydrochloride', 'total' => '2', 'inchi' => 'InChI=1S/C20H23NO4/c22-13-4-3-12-9-15-20(24)6-5-14(23)18-19(20,16(12)17(13)25-18)7-8-21(15)10-11-1-2-11/h3-4,11,15,18,22,24H,1-2,5-10H2/t15-,18+,19+,20-/m1/s1', 'inchikey' => 'DQCKKXVULJGBQN-XFWGSAIBSA-N', 'formula' => 'C20H23NO4', 'oxstate' => 'Zero', 'url' => '', 'charge' => '0', 'class1' => '', 'class2' => '', 'class3' => '', 'class4' => '', 'class5' => '', 'isgroup' => 'no', 'checked' => 'no', 'citation_count' => '0', 'updated' => '2015-12-11 16:36:07', 'first' => 'N', 'nametotal' => 'Naltrexone**2', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array( (int) 0 => array( 'id' => '0833', 'label' => 'Pharmaceutical', 'level1' => 'Pharmaceutical', 'level2' => '', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'total' => '452', 'url' => '', 'updated' => '2015-12-09 21:04:43', 'name' => 'Pharmaceutical', 'nametotal' => 'Pharmaceutical**452', 'first' => 'P', 'CitationsMatrix' => array( [maximum depth reached] ) ) ), 'Keyword' => array( (int) 0 => array( 'id' => '0109', 'type' => 'Detection limit', 'keyword' => 'Detection limit', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '296', 'first' => 'D', 'keytotal' => 'Detection limit**296', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 1 => array( 'id' => '0244', 'type' => 'Feature', 'keyword' => 'Linear dynamic range', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '70', 'first' => 'L', 'keytotal' => 'Linear dynamic range**70', 'CitationsKeyword' => array( [maximum depth reached] ) ), (int) 2 => array( 'id' => '0258', 'type' => 'Chemometrics', 'keyword' => 'Method comparison', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '1232', 'first' => 'M', 'keytotal' => 'Method comparison**1232', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 2 $path = '' $a = '' $url = 'http://dx.doi.org/10.1016/S0731-7085(96)01962-0' $aus = 'M. 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