Determination of Trace Amounts of Arsenic(III) and Arsenic(V) in Drinking Water and Arsenic(III) Vapor in Air by Graphite-Furnace Atomic Absorption Spectrophotometry Using 2,3-Dimercaptopropane-1-sulfonate as a Complexing Agent.

DOI PDF Web Site Web Site Web Site 3 Citations 38 References

Bibliographic Information

Other Title
  • Determination of Trace Amounts of Arsenic 3 and Arsenic 5 in Drinking Water and Arsenic 3 Vapor in Air by Graphite-Furnace Atomic Absorption Spectrophotometry Using 2 3 Dimercaptopropane 1 sulfonate as a Complexing Agent

Search this article

Abstract

As(III) (12.5 - 200 ng) in drinking water (25 ml) reacted with 2,3-dimercaptopropane-1-sulfonate (DMPS, 0.60 mg) in ammonium acetate buffer (2.0 mmol, pH 5.5) and formed a complex of As(III)-DMPS. The complex was selectively retained on two Sep-Pak C18 cartridges in series, while As(V) could not be retained. Each cartridge was eluted with methanol (2.00 ml). After addition of Ni2+ (2.0 mg), a portion (20 µl) was introduced into a graphite cuvette and was atomized according to a temperature program. As(V) (up to 100 ng) in drinking water (25 ml) was pre-reduced to As(III) with L-cysteine. The concentration of As(V) was determined by subtracting As(III) from the final total concentration of As(III)+As(V). The method detection limits (3σ) for As(III) and As(V) were 0.11 µg/l and 0.15 µg/l, respectively; the calibration graphs were linear up to 8.00 µg/l for As(III). Accuracies of 97.6 - 99.3% were obtained for As(III) and As(V) in drinking water with a precision within 4.0%. The proposed method could be applied to the determination of As(III) vapor in air with a detection limit of 2.8 ng.

Journal

  • Analytical Sciences

    Analytical Sciences 15 (7), 669-673, 1999

    The Japan Society for Analytical Chemistry

Citations (3)*help

See more

References(38)*help

See more

Keywords

Details 詳細情報について

Report a problem

Back to top