Development of a Solid-phase Extraction Method for the Trace Analysis of Perfluoroalkyl Substances in Open-ocean Water

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  • YAMAZAKI Eriko
    National Institute of Advanced Industrial Science and Technology (AIST), Environmental Management Research Institute, AIST Tsukuba West Kanazawa University, Graduated School of Natural Science and Technology
  • TANIYASU Sachi
    National Institute of Advanced Industrial Science and Technology (AIST), Environmental Management Research Institute, AIST Tsukuba West
  • SHIMAMURA Kodai
    National Institute of Advanced Industrial Science and Technology (AIST), Environmental Management Research Institute, AIST Tsukuba West
  • SASAKI Shunya
    Nihon Waters K.K., No. 5 Koike Bldg.
  • YAMASHITA Nobuyoshi
    National Institute of Advanced Industrial Science and Technology (AIST), Environmental Management Research Institute, AIST Tsukuba West

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  • 外洋海水中ペルフルオロ化合物微量分析のための固相抽出法の開発
  • ガイヨウ カイスイチュウ ペルフルオロ カゴウブツ ビリョウ ブンセキ ノ タメ ノ コソウ チュウシュツホウ ノ カイハツ

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Abstract

Ion-paring extraction method and solid-phase extraction method using four commercially available cartridges; namely, Sep-Pak®tC18, Oasis®HLB, Oasis®MCX, Oasis®WAX were tested for their capacity for the trace analysis of poly- and perfluoroalkyl substances (PFASs) including PFOS in open-ocean seawater. Six perfluoroalkyl sulfonic acids, twelve perfluoroalkyl carboxylic acid, three perfluoroalkyl sulfonamides, one fluorotelomer unsaturated carboxylic acid and one fluorotelomer carboxylic acid were investigated for each experiment. The former three cartridges and ion-paring extraction method failed to obtain acceptable recoveries of PFASs using open-ocean seawater. Although Oasis®WAX showed an acceptable recovery for most PFASs tested, several limitations to the use for open-ocean water remained. Hence, a newly manufactured type of weak anion-exchange cartridge, "WAXsea", with 30 μm of pore size and 500 mg of adsorbent was optimized for this purpose. "WAXsea" was validated using 1 L of open-ocean seawater collected from the Pacific Ocean and successfully detected PFOS and PFOA at 0.05 pg L−1 and 0.1 pg L−1, respectively.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 64 (10), 759-768, 2015

    The Japan Society for Analytical Chemistry

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