Speciation of antimony by adsorptive stripping voltammetry using pyrogallol

M Jesús Gómez González; Olga Domínguez Renedo; M Julia Arcos Martínez

doi:10.1016/j.talanta.2006.05.025

Speciation of antimony by adsorptive stripping voltammetry using pyrogallol

Talanta. 2007 Feb 15;71(2):691-8. doi: 10.1016/j.talanta.2006.05.025. Epub 2006 Jun 30.

Authors

M Jesús Gómez González¹, Olga Domínguez Renedo, M Julia Arcos Martínez

Affiliation

¹ Departamento de Química, Area de Química Analítica, Facultad de Ciencias, Universidad de Burgos, Plaza Misael Bañuelos s/n, E-09001 Burgos, Spain.

PMID: 19071361
DOI: 10.1016/j.talanta.2006.05.025

Abstract

This paper describes a new procedure for the determination of Sb (III) and Sb (V) by differential pulse adsorptive stripping voltammetry (DPAdSV) using pyrogallol as a complexing agent. The selection of the experimental conditions was made using experimental design methodology. The detection limits obtained were 1.03x10(-10) and 9.48x10(-9)mol dm(-3) for Sb (III) and Sb (V), respectively. In order to carry out the simultaneously determination of both antimony species a partial least squares regression (PLS) is employed to resolve the voltammetric signals from mixtures of Sb (III) and Sb (V) in the presence of pyrogallol. The relative error in absolute value is less than 0.5% when concentrations of several mixtures are calculated. Moreover, the solution is analyzed for any possible effects of foreign ions. The procedure is successfully applied to the speciation of antimony in pharmaceutical preparations and water samples.