Manivel, A. and Velayutham, D. and Noel, M. (2010) Voltammetric behavior of perfluorocarboxylic acids and their corresponding ethyl esters on glassy carbon electrode: surface effects. Ionics, 16. pp. 153-159. ISSN 0947-7047

PDF Restricted to Registered users only Download (197Kb) | Request a copy

Abstract

Voltammetric responses of trifluoroacetic acid, perfluorobutyric acid, perfluorohexanoic acid, and perfluorooctanoic acid (PFOA) were studied in acetonitrile/tetra-nbutylammonium perchlorate medium on glassy carbon electrode. All the four acids gave two voltammetric waves. PFOA exhibits blocking effects. In the presence of excess water, the first cathodic peak current increases, and the second peak disappeared. Very small quantity of triethylamine (TEA; 1–2 mM) was found to be effective in suppressing the first cathodic peak. Both the peak current and peak potential values were sensitive to water and TEA content. The ester derivatives of all the four perfluorocarboxylic acids (PFCAs), however, gave well-defined cathodic reduction peak around −2.3 V. This peak appears to be the best choice for quantitative estimation of PFCAs.

Item Type:	Article
Uncontrolled Keywords:	Perfluorocarboxylic acids; Voltammetry; Glassy carbon electrode; Trifluoroacetic acid; Perfluorobutyric acid; Perfluorohexanoic acid; Perfluorooctanoic acid
Subjects:	Electroorganic
Divisions:	UNSPECIFIED
Depositing User:	ttbdar CECRI
Date Deposited:	08 May 2012 08:29
Last Modified:	08 May 2012 08:29
URI:	http://cecri.csircentral.net/id/eprint/270

Actions (login required)

View Item