Evaluation of a silver-based electrocatalyst for the determination of hydrogen peroxide formed via enzymatic oxidation

Gonzalez-Macia, L., Smyth, M. and Killard, A. (2012) Evaluation of a silver-based electrocatalyst for the determination of hydrogen peroxide formed via enzymatic oxidation. Talanta, 99. pp. 989-996. ISSN 0039-9140

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Publisher's URL: http://dx.doi.org/10.1016/j.talanta.2012.07.082

Abstract

Silver paste electrodes modified with lyotropic phases formed from dodecyl benzenesulphonic acid and KCl were used as the reductant in the determination of the hydrogen peroxide released from the enzymatic reaction of glucose oxidase with glucose and oxygen. The response of the modified electrode to hydrogen peroxide reduction (-0.1 V vs. Ag/AgCl) was shown to suffer from interference resulting from co-localisation of enzyme and substrate at the electrode surface. This interference was eradicated by the introduction of a perm-selective membrane in the form of cellulose acetate. This further facilitated immobilisation of the enzyme while allowing diffusion of the generated peroxide to the electrode. The resulting configuration was shown to be capable of the analytical determination of glucose

Item Type:Article
Uncontrolled Keywords:silver, screen-printed electrode, hydrogen peroxide, dodecylbenzene sulphonic acid, glucose, glucose oxidase
Faculty/Department:Faculty of Health and Applied Sciences > Department of Biological, Biomedical and Analytical Sciences
ID Code:17676
Deposited By: Professor T. Killard
Deposited On:08 Nov 2012 17:00
Last Modified:24 Jan 2014 08:51

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