Anodic stripping voltammetric determination of bismuth(III) using a Tosflex-coated mercury film electrode

Hao Yun Yang, Wen Yin Chen, I. Wen Sun

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37 Citations (Scopus)

Abstract

A Tosflex-mercury film electrode (TMFE) was prepared by spin-coating a solution of the perfluorinated anion exchange polymer Tosflex onto a glassy carbon electrode surface followed by electrodeposition of mercury film on this electrode. This electrode was used for the determination of trace bismuth(III) which was preconcentrated onto the TMFE as anionic bismuth(III) complexes with chloride in a chloride medium. The preconcentration was carried out at a potential of -0.2 V, and the preconcentration of the bismuth(III) was enhanced significantly by the anion-exchange feature of Tosflex. The accumulated bismuth(III) was then determined by anodic square- wave stripping voltammetry (SWSV). Various parameters influencing the determination of bismuth(III) were examined in detail. With 2 min accumulation, the analytical signal versus concentration dependence was linear up to 50 ppb, and the detection limit was 0.58 ppb. This modified electrode showed good resistance to the interferences from surface-active compounds and common ions.

Original languageEnglish
Pages (from-to)977-984
Number of pages8
JournalTalanta
Volume50
Issue number5
DOIs
Publication statusPublished - 1999 Dec

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

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