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Electrochemical manipulation of localised pH: application to electroanalysis

Biomedical Sciences Research Institute Computer Science Research Institute Environmental Sciences Research Institute Nanotechnology & Advanced Materials Research Institute

Davis, J and Cooper, JM (2002) Electrochemical manipulation of localised pH: application to electroanalysis. JOURNAL OF ELECTROANALYTICAL CHEMISTRY, 520 (1-2). pp. 13-17. [Journal article]

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Abstract

The electrochemical manipulation of the local pH at a polymer functionalised electrode has been achieved in order to enhance the electrochemical response to cationic analytes. The changes in pH have been shown to provide a method for significantly enhancing the analytical signal towards the model compounds, dopamine and p-aminophenol. The procedure was found to operate irrespective of the electrical properties of the film. The main requirement for this electroanalytical system is that the film contains acidic groups within the polymer backbone. In the carboxylic acid functionalised polypyrrole film studied here, the performance was found to be greatest when the bulk solution pH was less than the pK(a) of the acid groups. The mechanism attributed to the enhanced response is elucidated and the limitations of the technique are assessed. (C) 2002 Elsevier Science B.V.. All rights reserved.

Item Type:Journal article
Faculties and Schools:Faculty of Computing & Engineering
Faculty of Computing & Engineering > School of Engineering
Research Institutes and Groups:Engineering Research Institute
Engineering Research Institute > Nanotechnology & Integrated BioEngineering Centre (NIBEC)
ID Code:14361
Deposited By:Professor James Davis
Deposited On:01 Jul 2010 09:46
Last Modified:18 Aug 2011 11:19

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