Design of in situ Solid-Phase Extraction for a Simple and Rapid Preconcentration of Trace Chemical Species for Field Work and Its Application to the Speciation of Environmental Water Samples

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  • OKUMURA Minoru
    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

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  • 環境水中微量化学種の捕集濃縮のための現場固相抽出法の設計とその水環境におけるスペシエーションへの展開
  • カンキョウ スイチュウ ビリョウ カガクシュ ノ ホシュウ ノウシュク ノ タメ ノ ゲンバコソウ チュウシュツホウ ノ セッケイ ト ソノ ミズ カンキョウ ニ オケル スペシエーション エ ノ テンカイ

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Abstract

In situ solid-phase extraction, which is a simple and rapid in situ method using a small column (Sep-Pak cartridge) for the preconcentration of trace chemical species in environmental water samples for field work, has been developed for applications to the speciation of chemical species in aqueous environments. In this method, water samples are taken into a graduated syringe to prevent them from contacting with air and from contamination, and to perform all operations of the solid-phase extraction procedure easily without any instrument in field work. A hydrophobic Sep-Pak C18 cartridge was used to collect chemical species, such as H2S, NH3, Fe(II), and Mn(II); an oxine-loaded Sep-Pak cartridge was used for heavy metals, such as Cd, Co, Cu, Ni, Pb, and Zn; a connected cartridge, consisting of two cartridges (Sep-Pak C18 and TBAHS-loaded Sep-Pak) was used for SO32− and S2O32−; a zirconium-loaded Sep-Pak cartridge was used for PO43− and As(III, V); and a OH-anion exchange Sep-Pak cartridge was used for sulfide of lake sediment and dissolved CO2. Through sample collection by Sep-Pak cartridges as a small column, it is advantageous and more convenient to make the sample size smaller for the sake of easy carriage and long storage of samples in field work. As results of applying in situ solid-phase extraction to environmental water, the speciation of some redox-sensitive chemical species, such as Mn(II), H2S and Fe(II), and As(III, V), in brackish lakes was shown.<br>

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 54 (11), 1061-1073, 2005

    The Japan Society for Analytical Chemistry

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