In situ Preconcentration Method for Trace Dissolved Sulfide in Environmental Water Samples Using Solid-Phase Extraction Followed by Spectrophotometric Determination.

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  • OKUMURA Minoru
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
  • YANO Naoaki
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
  • FUJINAGA Kaoru
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
  • SEIKE Yasushi
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University
  • MATSUO Shuji
    Department of Material Science, Interdisciplinary Faculty of Science and Engineering, Shimane University

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Abstract

A simple and rapid method for the in situ preconcentration of trace dissolved sulfide in environmental water samples has been developed based on solid-phase extraction using Sep-Pak C18 cartridges. Dissolved sulfide in water samples, which was taken into a graduated syringe to prevent the oxidation of sulfide by air, was reacted with N,N-dimethyl-p-phenylene-diamine sulfate and iron(III) chloride to be converted into Methylene Blue immediately after sample collection. The formed Methylene Blue was adsorbed on Sep-Pak C18, which was stable on Sep-Pak C18 for at least 30 d. The adsorbed Methylene Blue was eluted with a mixture of methanol and 0.01 M hydrochloric acid. The color intensity due to the Methylene Blue was measured at 659 nm. The proposed method is applicable to brackish and sea water samples as well as freshwater.

Journal

  • Analytical Sciences

    Analytical Sciences 15 (5), 427-431, 1999

    The Japan Society for Analytical Chemistry

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