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Determination of thorium isotopes in seawater by using preconcentration of thorium-XO complexes on XAD-2 resin

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Abstract

Thorium isotopes in seawater are determined by means of adsorption of the Xylenol Orange /XO: H6A/ complex onto XAD-2 resin at pH=3 and the XO concentration of 10−5M, and subsequent purification using an anion-exchange resin, and finally with alpha-spectrometry. The dissolved232Th concentration in the western North Pacific surface water is found to range from 0.8 to 1.2 μBq ℓ−1. The adsorbed species of the Th-XO complex under the experimental conditions has a composition of Th/H2A/2 according to the mass balance analysis.

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Authors and Affiliations

  1. Geochemical Laboratory, Meteorological Research Institute, Nagamine 1-1, Yatabe, 305, Tsukuba, Ibaraki, Japan

    K. Hirose

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  1. K. Hirose
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Hirose, K. Determination of thorium isotopes in seawater by using preconcentration of thorium-XO complexes on XAD-2 resin. Journal of Radioanalytical and Nuclear Chemistry Letters 127, 199–207 (1988). https://doi.org/10.1007/BF02164865

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  • DOI: https://doi.org/10.1007/BF02164865

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