Catalytic adsorptive stripping voltammetric measurements of trace vanadium at bismuth film electrodes

Joseph Wang, Donglai Lu, Sompong Thongngamdee, Yuehe Lin, Omowunmi A. Sadik

Research output: Contribution to journalArticlepeer-review

73 Scopus citations


Bismuth-coated glassy carbon electrodes have been successfully applied for catalytic adsorptive stripping voltammetric measurements of low levels of vanadium(V) in the presence of chloranilic acid (CAA) and bromate ion. The new protocol is based on the accumulation of the vanadium-chloranilic acid complex from an acetate buffer (pH 5.5) solution at a preplated bismuth film electrode held at -0.35 V (versus Ag/AgCl), followed by a square-wave voltammetric scan. Factors influencing the adsorptive stripping performance, including the CAA and bromate concentrations, solution pH, and accumulation potential or time have been optimized. The response compares favorably with that observed at mercury film electrodes. A linear response is observed over the 5-25 μg/L concentration range (2 min accumulation), along with a detection limit of 0.20 μg/L vanadium (10 min accumulation). High stability is indicated from the reproducible response of a 50 μg/L vanadium solution (n = 25; R.S.D. = 3.1%). Applicability to a groundwater sample is illustrated.

Original languageEnglish (US)
Pages (from-to)914-917
Number of pages4
Issue number4
StatePublished - Jun 15 2006
Externally publishedYes

All Science Journal Classification (ASJC) codes

  • Analytical Chemistry


  • Bismuth film electrode
  • Catalytic adsorptive stripping voltammetry
  • Chloranilic acid (CAA)
  • Vanadium


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