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Evidence of an EC' mechanism occurring during the simultaneous assay of ascorbic and uric acids on poly(3,4-ethylenedioxythiophene) modified gold microsensor

Sekli-Belaidi, Fadhila and Evrard, David and Gros, Pierre Evidence of an EC' mechanism occurring during the simultaneous assay of ascorbic and uric acids on poly(3,4-ethylenedioxythiophene) modified gold microsensor. (2011) Electrochemistry Communications, vol. 13 . pp. 423-425. ISSN 1388-2481

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Official URL: http://dx.doi.org/10.1016/j.elecom.2011.02.009

Abstract

A voltammetric microsensor has been developed for the simultaneous assay of ascorbic (AA) and uric (UA) acids in aq. soln. The electrode surface has been modified by means of electropolymd. conductive poly(3,4-ethylenedioxythiophene) (PEDOT) org. films. The anodic peak potential sepn. between both acids was more than 300 mV. The sensitivity of the microsensor for UA was found to be dependent on the presence of AA in the mixt. By using square wave voltammetry (SWV), it increased from 77.5 mA mM-1 cm-2 without AA to 86.2 mA mM-1 cm-2 with AA 1 mM. An EC' catalytic mechanism was highlighted, inducing the regeneration of reduced UA by AA at the vicinity of the electrode surface.

Item Type:Article
Additional Information:Thanks to Elsevier editor. The definitive version is available at http://dx.doi.org/10.1016/j.elecom.2011.02.009
Audience (journal):International peer-reviewed journal
Uncontrolled Keywords:
Institution:French research institutions > Centre National de la Recherche Scientifique - CNRS
Université de Toulouse > Institut National Polytechnique de Toulouse - INPT
Université de Toulouse > Université Paul Sabatier-Toulouse III - UPS
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Deposited By: David Evrard
Deposited On:02 Sep 2011 08:54

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