| Electrocatalytic determination of ascorbic acid on a glassy carbon electrode chemically modified with cobalt pentacyanonitrosylferrate. | |
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MedLine Citation:
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PMID: 15984207 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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An electrochemically prepared thin film of cobalt pentacyanonitrosylferrate (GC/CoPCNF) was used as a surface modifier for glassy carbon electrodes. The oxidation of ascorbic acid on a glassy carbon electrode modified with GC/CoPCNF as a working electrode was studied using cyclic voltammetry, rotating disk electrode (RDE) voltammetry and chronoamperometry in a 0.25 M KNO3 + 0.25 M phosphate buffer (pH 7) solution. The glassy carbon modified with CoPCNF showed good electrocatalytic activity toward ascorbic acid oxidation. The kinetics of the catalytic reaction was investigated, and the average value of the rate constant (k) for the catalytic reaction and the diffusion coefficient (D) were evaluated by different approaches for ascorbic acid, and were found to be 3.3 +/- 0.3 x 10(2) M(-1) s(-1) and 3.2 +/- 0.3 x 10(-6) cm2 s(-1), respectively. |
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Authors:
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Reza Emamali Sabzi; Mohammad Hussein Pournaghi-Azar |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Analytical sciences : the international journal of the Japan Society for Analytical Chemistry Volume: 21 ISSN: 0910-6340 ISO Abbreviation: Anal Sci Publication Date: 2005 Jun |
Date Detail:
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Created Date: 2005-06-29 Completed Date: 2006-05-22 Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8511078 Medline TA: Anal Sci Country: Japan |
Other Details:
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Languages: eng Pagination: 689-92 Citation Subset: IM |
Affiliation:
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Department of Chemistry, Faculty of Science, Urmia University, Urmia, Iran. rezasabzi@yahoo.com |
Export Citation:
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| MeSH Terms | |
Descriptor/Qualifier:
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Algorithms Ascorbic Acid / analysis* Carbon Catalysis Electrochemistry Electrodes Indicators and Reagents Kinetics Organometallic Compounds / chemistry* |
| Chemical | |
Reg. No./Substance:
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0/Indicators and Reagents; 0/Organometallic Compounds; 0/cobalt pentacyanonitrosylferrate; 50-81-7/Ascorbic Acid; 7440-44-0/Carbon |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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