Issue 8, 2010

Graphite screen printed electrodes for the electrochemical sensing of chromium(vi)

Abstract

We demonstrate that graphite screen printed macroelectrodes allow the low ppb sensing of chromium(VI) in aqueous solutions over the range 100 to 1000 µg L−1 with a limit of detection of 19 µg L−1. The underlying electrochemical mechanism is explored indicating an indirect process involving surface oxygenated species. The drawbacks of using hydrochloric acid as a model solution to evaluate the electrochemical detection of chromium(VI) are also pointed out. The analytical protocol is shown to be applicable for the sensing of chromium(VI) in canal water samples at levels set by the World Health Organisation. The protocol is simplified over existing analytical methodologies and given its analytical performance and economical nature, holds promise for the de-centralised screening of chromium(VI).

Graphical abstract: Graphite screen printed electrodes for the electrochemical sensing of chromium(vi)

Article information

Article type
Paper
Submitted
12 Apr 2010
Accepted
14 May 2010
First published
07 Jun 2010

Analyst, 2010,135, 1947-1952

Graphite screen printed electrodes for the electrochemical sensing of chromium(VI)

P. M. Hallam, D. K. Kampouris, R. O. Kadara and C. E. Banks, Analyst, 2010, 135, 1947 DOI: 10.1039/C0AN00228C

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