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Titolo:
Electrochemical characterisation of uric acid and ascorbic acid at a platinum electrode
Autore:
Ernst, H; Knoll, M;
Indirizzi:
Inst Chemo & Biosensor, D-48161 Munster, Germany Inst Chemo & Biosensor Munster Germany D-48161 D-48161 Munster, Germany
Titolo Testata:
ANALYTICA CHIMICA ACTA
fascicolo: 1-2, volume: 449, anno: 2001,
pagine: 129 - 134
SICI:
0003-2670(200112)449:1-2<129:ECOUAA>2.0.ZU;2-2
Fonte:
ISI
Lingua:
ENG
Soggetto:
L(+)-ASCORBIC ACID; MERCURY-ELECTRODE; OXIDATION; ELECTROOXIDATION; ADSORPTION; MECHANISM; SYSTEM; FTIR; BI;
Keywords:
ascorbic acid; electro-oxidation; polycrystalline platinum; uric acid;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Ernst, H Inst Chemo & Biosensor, Mendelstr 7, D-48161 Munster, Germany Inst Chemo & Biosensor Mendelstr 7 Munster Germany D-48161 rmany
Citazione:
H. Ernst e M. Knoll, "Electrochemical characterisation of uric acid and ascorbic acid at a platinum electrode", ANALYT CHIM, 449(1-2), 2001, pp. 129-134

Abstract

Cyclic voltammetric measurements at the rotating disk electrode have been carried out to investigate the electrochemical oxidation of uric acid, ascorbic acid and the simultaneous oxidation of both substances at a polycrystalline platinum electrode. The standard heterogeneous rate constant and the charge transfer coefficient have been determined for ascorbic acid to be 2.7 x 10(-4) m s(-1) and 0.15, respectively. It has been found that uric acidstrongly adsorbs at the platinum electrode, and the diffusion coefficientsfor both compounds have been determined. Uric and ascorbic acid were foundto undergo oxidation simultaneously in the same potential region. Our preliminary investigation of the mechanistic interactions will be discussed. (C) 2001 Elsevier Science B.V. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 04/12/20 alle ore 21:53:04