Integrated three-electrode screen-printed sensor modified with bismuth film for voltammetric determination of thallium(I) at the ultratrace level

K Domańska; K Tyszczuk-Rotko

doi:10.1016/j.aca.2018.06.078

Integrated three-electrode screen-printed sensor modified with bismuth film for voltammetric determination of thallium(I) at the ultratrace level

Anal Chim Acta. 2018 Dec 7:1036:16-25. doi: 10.1016/j.aca.2018.06.078. Epub 2018 Jun 30.

Authors

K Domańska¹, K Tyszczuk-Rotko²

Affiliations

¹ Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031, Lublin, Poland.
² Department of Analytical Chemistry and Instrumental Analysis, Faculty of Chemistry, Maria Curie-Skłodowska University, 20-031, Lublin, Poland. Electronic address: ktyszczuk@poczta.umcs.lublin.pl.

PMID: 30253827
DOI: 10.1016/j.aca.2018.06.078

Abstract

In the present paper, for the first time, the integrated three-electrode screen-printed sensor with in situ plated bismuth film carbon working electrode was applied for the ultratrace determination of thallium(I) (Tl(I)). Under optimized conditions extremely low limits of detection were reached, 8.47 × 10^-10 and 6.71 × 10^-12 mol L^-1 for the deposition times of 60 s and 300 s, respectively. The influences of foreign metal ions and surfactants on the voltammetric signal of thallium in natural samples were minimized using 1 × 10^-5 mol L^-1 EDTA and Amberlite XAD-7 resin added to the buffer solution (CH₃COONH₄, CH₃COOH and NH₄Cl) of pH = 4.6 ± 0.1. The developed voltammetric method with integrated three-electrode screen-printed sensor was validated with use of certified reference materials (surface, rain and natural water) and can be in future applied to field analyses of Tl(I).

Keywords: Anodic stripping voltammetry; Field analysis; Integrated three-electrode screen-printed sensor; Modification with bismuth film; Thallium(I) determination.