Simultaneous determination of antimony(III) and antimony(V) by UV-vis spectroscopy and partial least squares method (PLS)

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

doi:10.1016/j.talanta.2005.04.059

Simultaneous determination of antimony(III) and antimony(V) by UV-vis spectroscopy and partial least squares method (PLS)

Talanta. 2005 Nov 15;68(1):67-71. doi: 10.1016/j.talanta.2005.04.059. Epub 2005 Jun 13.

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: 18970286
DOI: 10.1016/j.talanta.2005.04.059

Abstract

This paper describes a procedure for the speciation of antimony by UV-vis spectroscopy using pyrogallol as complexing agent. A partial least squares (PLS) regression was performed to resolve highly overlapping spectrophotometric signals obtained from mixtures of Sb(III) and Sb(V). The relative error in absolute value was less than 5% when concentrations of several mixtures were calculated. The minimum concentration determined was 3.96x10(-5)moldm(-3) and 3.98x10(-5)moldm(-3) for Sb(V) and Sb(III), respectively. The analysis of the possible effect of the presence of foreign ions in the solution was performed and the procedure was successfully applied to the speciation of antimony in pharmaceutical preparations and aqueous samples.