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 2
"Conducting Organic Salt Amperometric Glucose Sensor In Continuous-flow Monitoring Using A Wall-jet Cell"
Anal. Chim. Acta
1990 Volume 229, Issue 1 Pages 83-91
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For determination of 5.5 to 11 mM I in whole blood at 0.15 V and 0.5 mL min-1, results by method (ii) were lower than those by method (i) and were in better agreement with results obtained with use of a Haemo-glutotest 20-800R (Boehringer Mannheim) test strip.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '0000-00-00 00:00:00', 'hits' => '7', 'urlcheck' => '2014-10-11 15:58:22', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00984', 'pauthor' => '!Gunasingham, H.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1016/S0003-2670(00)85112-0', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Conducting organic salt amperometric glucose sensor in continuous-flow monitoring using a wall-jet cell', Anal. Chim. 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Abstract:
A paste was prepared by mixing tetrathiafulvalene - 7,7,8,8-tetracyanoquinodimethane complex salt with 10% of Nujol (with or without added graphite) and packed into the well of an electrode consisting of a PTFE holder and a graphite disc. The paste was successively covered with glucose oxidase, bovine serum albumin - glutaraldehyde (4:1) and a 0.03 µm-pore polycarbonate membrane. The electrode was used with a large-volume wall-jet cell, a graphite counter-electrode and Ag - AgCl reference electrode in an automated system for (i) flow injection or (ii) steady-state analysis. At 0.2 V a rectilinear response was observed for up to 60 mM glucose (I) by method (i) or 30 mM by method (ii). Results obtained by method (ii) were more consistent than those by method (i). For determination of 5.5 to 11 mM I in whole blood at 0.15 V and 0.5 mL min-1, results by method (ii) were lower than those by method (i) and were in better agreement with results obtained with use of a Haemo-glutotest 20-800R (Boehringer Mannheim) test strip.
Glucose
Whole
Complexation
Method comparison
"Organic-phase Enzyme Electrode For The Determination Of Phenols In Olive Oils"
Anal. Lett.
1992 Volume 25, Issue 8 Pages 1399-1409
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Olive oil was dissolved in CHCl3 containing 0.1 M tetrabutylammonium bromide and saturated with the phosphate buffer. Amperometric wall-jet detection of phenols was performed at -0.2 V in a flow injection system (0.4 mL min-1) with a 20 µL sample loop. Quantitation was effected by the standard-additions method. The detection limit was 0.4 µM (0.8 ng) of phenol with an analysis rate of 60 samples h-1. The calibration graph was rectilinear up to 0.6 mM.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-31 09:50:01', 'hits' => '5', 'urlcheck' => '2014-10-12 08:33:54', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00332', 'pauthor' => '!Wang, J.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032719208017124', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Organic-phase enzyme electrode for the determination of phenols in olive oils', Anal. 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Olive oil was dissolved in CHCl3 containing 0.1 M tetrabutylammonium bromide and saturated with the phosphate buffer. Amperometric wall-jet detection of phenols was performed at -0.2 V in a flow injection system (0.4 mL min-1) with a 20 µL sample loop. Quantitation was effected by the standard-additions method. The detection limit was 0.4 µM (0.8 ng) of phenol with an analysis rate of 60 samples h-1. The calibration graph was rectilinear up to 0.6 mM.', 'language' => 'English', 'updated' => '2020-12-28 11:25:15', 'sjccheck' => 'Yes', 'sjccheckdate' => '2007-03-31 09:50:01', 'hits' => '5', 'urlcheck' => '2014-10-12 08:33:54', 'urlcheckcode' => 'HTTP/1.1 302 Found', 'pauthor_id' => '00332', 'pauthor' => '!Wang, J.', 'address' => 'pau', 'email' => 'pau', 'notes' => null, 'url' => '10.1080/00032719208017124', 'urltype' => 'doi', 'gotpdf' => 'yes', 'partial' => 'no', 'notanalyte' => '', 'citation' => ''Organic-phase enzyme electrode for the determination of phenols in olive oils', Anal. Lett., 1992 25(8) 1399-1409', 'firstchar' => 'O', 'twochars' => 'Or', 'CitationsTechnique' => array( 'id' => '008051', 'citation_id' => '009650', 'technique_id' => '0113' ), 'Analyte' => array( (int) 0 => array( 'id' => '01809', 'name' => 'Phenols', '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' => '', 'isgroup' => 'yes', 'checked' => 'yes', 'citation_count' => '0', 'updated' => '2015-12-11 09:54:00', 'first' => 'P', 'nametotal' => 'Phenols**46', 'AnalytesCitation' => array( [maximum depth reached] ) ) ), 'Matrix' => array( (int) 0 => array( 'id' => '0762', 'label' => 'Oil', 'level1' => 'Oil', 'level2' => 'olive', 'level3' => '', 'level4' => '', 'level5' => '', 'synonyms' => '', 'total' => '8', 'url' => '', 'updated' => '2015-12-09 21:04:43', 'name' => 'Oil, olive', 'nametotal' => 'Oil, olive**8', 'first' => 'O', 'CitationsMatrix' => array( [maximum depth reached] ) ) ), 'Keyword' => array( (int) 0 => array( 'id' => '0440', 'type' => 'Chemometrics', 'keyword' => 'Standard additions calibration', 'newKeyword' => '', 'synonyms' => '', 'fao' => '', 'total' => '147', 'first' => 'S', 'keytotal' => 'Standard additions calibration**147', 'CitationsKeyword' => array( [maximum depth reached] ) ) ) ) $i = (int) 1 $path = '' $a = '' $url = 'http://dx.doi.org/10.1080/00032719208017124' $aus = 'Wang, J.;Reviejo, A.J.;Mannino, S.'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 polished graphite disc (3 mm diameter) was covered with a solution of tyrosinase in 0.05 M phosphate buffer (pH 7.4) and was dried with a heat gun. Olive oil was dissolved in CHCl3 containing 0.1 M tetrabutylammonium bromide and saturated with the phosphate buffer. Amperometric wall-jet detection of phenols was performed at -0.2 V in a flow injection system (0.4 mL min-1) with a 20 µL sample loop. Quantitation was effected by the standard-additions method. The detection limit was 0.4 µM (0.8 ng) of phenol with an analysis rate of 60 samples h-1. The calibration graph was rectilinear up to 0.6 mM.
Phenols
Oil
Standard additions calibration