Issue 14, 2013

Screen printed graphite electrochemical sensors for the voltammetric determination of antimony(iii)

Abstract

The electroanalytical determination of antimony(III) is explored using disposable and economical unmodified screen printed graphite macro-electrodes. These sensors are found to allow the sensing of antimony(III) via anodic stripping voltammetry over the range of 1 to 910 μg L−1 in pH 3.5 acetate buffer solutions with a limit of detection found to correspond to 0.58 μg L−1. The analytical protocol is applied to the sensing of antimony(III) in drinking water samples where a limit of detection was found to correspond to 1.2 μgL−1. The observed detection limits are well below those recommended by the US Environmental Agency and World Health Organisation for antimony(III) concentrations in drinking water. The effects of interferences on the electroanalytical protocol are also explored, where only copper(II) ions are found to be problematic due to the close proximity of the antimony and copper stripping peaks. Proof-of-concept is demonstrated that the interference from copper(II) ions can be eliminated through the application of a complexing agent.

Graphical abstract: Screen printed graphite electrochemical sensors for the voltammetric determination of antimony(iii)

Article information

Article type
Paper
Submitted
24 Apr 2013
Accepted
20 May 2013
First published
14 Jun 2013

Anal. Methods, 2013,5, 3490-3496

Screen printed graphite electrochemical sensors for the voltammetric determination of antimony(III)

A. V. Kolliopoulos, J. P. Metters and C. E. Banks, Anal. Methods, 2013, 5, 3490 DOI: 10.1039/C3AY40683K

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