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Determination of99Tc in coastal seawater collected in Fukuoka, Japan

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Abstract

Concentrations of99Tc were determined by inductively coupled plasma mass spectrometry (ICP-MS) on coastal seawater in the general environment in Japan. Technetium was enriched on iron hydroxide by repetitive co-precipitation method from a large volume of seawater and separated from impurities by solvent extraction and ion-exchange techniques. The concentrations of99Tc were 1.0 to 7.4 μBq1−1, which was one order of magnitude lower than the level reported on seawater from general environment by beta-ray counting. Concentrations of137Cs determined on the same seawater were 3.7 and 3.9 mBq1−1. The activity ratio of99Tc/137Cs was calculated to be 2.7×10−4. This ratio was very close to the value expected for fallout from nuclear tests.

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Authors and Affiliations

  1. Department of Chemistry, Faculty of Science, Kyushu University, 33 Hakozaki, Higashiku, 812, Fukuoka, (Japan)

    N. Momoshima & M. Sayad

  2. Kyushu Environmental Evaluation Association, Matsukadai, Higashiku, 813, Fukuoka, (Japan)

    Y. Takashima

Authors
  1. N. Momoshima
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  2. M. Sayad
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  3. Y. Takashima
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Momoshima, N., Sayad, M. & Takashima, Y. Determination of99Tc in coastal seawater collected in Fukuoka, Japan. Journal of Radioanalytical and Nuclear Chemistry, Articles 197, 245–251 (1995). https://doi.org/10.1007/BF02036003

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  • DOI: https://doi.org/10.1007/BF02036003

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