Gamma-ray Spectrometry of Short-lived Radionuclides in Rain Water Collected with Solid Phase Extraction Disk

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  • KOIKE Yuya
    Department of Applied Chemistry, School of Science and Technology, Meiji University
  • SUMIYAMA Hiroaki
    Department of Applied Chemistry, School of Science and Technology, Meiji University
  • ODAGIRI Yusuke
    Department of Applied Chemistry, School of Science and Technology, Meiji University
  • INUI Tetsuo
    Department of Applied Chemistry, School of Science and Technology, Meiji University
  • IWAHANA Yuki
    Department of Applied Chemistry, School of Science and Technology, Meiji University
  • KURIHARA Yuichi
    Organization for the Strategic Coordination of Research and Intellectual Properties, Meiji University Radioisotope Center, The University of Tokyo
  • NAKAMURA Toshihiro
    Department of Applied Chemistry, School of Science and Technology, Meiji University

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Other Title
  • 固相ディスク捕集/ガンマ線スペクトロメトリーによる雨水中の短寿命放射性核種分析
  • コソウ ディスクホシュウ/ガンマセン スペクトロメトリー ニ ヨル ウスイ チュウ ノ タンジュミョウ ホウシャセイカクシュ ブンセキ

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Abstract

An analytical method for short-lived nuclides in rainwater using γ-ray spectrometry combined with solid-phase extraction on an ion-exchange extraction disk has been developed. Rapid pretreatment is important in determining radioactive nuclides in rainwater, because short-lived nuclides disintegrate and decrease for sampling and measurements. The appropriate measurement time for each radioactive nuclide in rainwater was considered. The disk-shaped ion-exchange resin and chelating resin enable a simple concentration of trace metals in environmental water. A rainwater sample was passed through EmporeTM ion-exchange disks of Cation-SR and Anion-SR, pretreated with methanol for 10 minutes. The radioactivity of short-lived nuclides in rainwater samples was determined by using a HP-Ge spectrometer. Several environmental radionuclides (7Be, 131I, 134Cs, 137Cs, 212Pb, 214Pb, 212Bi and 214Bi) were identified on the gamma-ray spectra of rainwater samples. A spike test for three analytes (Tl, Pb and Bi) showed good recoveries (94 – 100%) for rainwater. The present method is more rapid than the conventional method.

Journal

  • BUNSEKI KAGAKU

    BUNSEKI KAGAKU 62 (6), 507-512, 2013

    The Japan Society for Analytical Chemistry

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