Determination of trace Se(IV) by anodic stripping voltammetry following double deposition and stripping steps

Mateusz Ochab; Iwona Gęca; Mieczyslaw Korolczuk

doi:10.1016/j.talanta.2016.12.034

Determination of trace Se(IV) by anodic stripping voltammetry following double deposition and stripping steps

Talanta. 2017 Apr 1:165:364-368. doi: 10.1016/j.talanta.2016.12.034. Epub 2016 Dec 18.

Authors

Mateusz Ochab¹, Iwona Gęca², Mieczyslaw Korolczuk¹

Affiliations

¹ Faculty of Chemistry, Maria Curie Sklodowska University, 20-031 Lublin, Poland.
² Faculty of Chemistry, Maria Curie Sklodowska University, 20-031 Lublin, Poland. Electronic address: iwona.rutyna@poczta.umcs.lublin.pl.

PMID: 28153268
DOI: 10.1016/j.talanta.2016.12.034

Abstract

A procedure of Se(IV) determination by anodic stripping voltammetry using two deposition and stripping steps at gold electrodes was proposed. A well-defined stripping peak of selenium was obtained at potential 0.9 V. The optimization of parameters influencing the selenium peak current including both deposition and stripping steps was performed. A linear relationship was observed between the Se(IV) peak current and its concentration in the range from 5×10^-9 to 1×10^-7mol L^-1. The limit of detection was found to be 8.5×10^-10mol L^-1. Repeatability of the method determined as RSD % for Se(IV) concentration of 5×10^-8mol L^-1 was 4.3% (n=7). The proposed procedure was used for Se(IV) determination in certified reference material and natural water samples and acceptable results and recoveries were obtained.

Keywords: Determination; Double deposition; Selenium; Stripping analysis.