Stripping voltammetric determination of mercury(II) at antimony-coated carbon paste electrode

Amir M Ashrafi; Karel Vytřas

doi:10.1016/j.talanta.2011.07.078

Stripping voltammetric determination of mercury(II) at antimony-coated carbon paste electrode

Talanta. 2011 Oct 15;85(5):2700-2. doi: 10.1016/j.talanta.2011.07.078. Epub 2011 Jul 29.

Authors

Amir M Ashrafi¹, Karel Vytřas

Affiliation

¹ Department of Analytical Chemistry, University of Pardubice, Studentská 573, CZ-532 10 Pardubice, Czech Republic.

PMID: 21962705
DOI: 10.1016/j.talanta.2011.07.078

Abstract

A new procedure was elaborated to determine mercury(II) using an anodic stripping square-wave voltammetry at the antimony film carbon paste electrode (SbF-CPE). In highly acidic medium of 1M hydrochloric acid, voltammetric measurements can be realized in a wide potential window. Presence of cadmium(II) allows to separate peaks of Hg(II) and Sb(III) and apparently catalyses reoxidation of electrolytically accumulated mercury, thus allowing its determination at ppb levels. Calibration dependence was linear up to 100 ppb Hg with a detection limit of 1.3 ppb. Applicability of the method was tested on the real river water sample.