Square-wave anodic stripping voltammetric determination of thallium(I) at a Nation/mercury film modified electrode

Tsai Hwa Lu, Hao Yun Yang, I. Wen Sun

Research output: Contribution to journalArticle

39 Citations (Scopus)

Abstract

A Nafion/mercury film electrode (NMFE) was used for the determination of trace thallium(I) in aqueous solutions. Thallium(I) was preconcentrated onto the NMFE from the sample solution containing 0.01 M ethylenediaminetetraacetate (EDTA), and determined by square-wave anodic stripping voltammetry (SWASV). Various factors influencing the determination of thallium(I) were thoroughly investigated. This modified electrode exhibits good resistance to interferences from surface-active compounds. The presence of EDTA effectively eliminated the interferences from metal ions, such as lead(II) and cadmium(II), which are generally considered as the major interferents in the determination of thallium at a mercury electrode. With 2- min preconcentration, linear calibration graphs were obtained over the range 0.05-100 ppb of thallium(I). An even lower detection limit, 0.01 ppb, were achieved with 5-min accumulation. The electrode is easy to prepare and can be readily renewed after each stripping experiment. Applicability of this procedure to various water samples is illustrated.

Original languageEnglish
Pages (from-to)59-68
Number of pages10
JournalTalanta
Volume49
Issue number1
DOIs
Publication statusPublished - 1999 Jun

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry

Fingerprint Dive into the research topics of 'Square-wave anodic stripping voltammetric determination of thallium(I) at a Nation/mercury film modified electrode'. Together they form a unique fingerprint.

Cite this