Neutron activation analysis of iodine in soil |
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Authors: | Y Muramatsu S Yoshida |
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Institution: | (1) Division of Radioecology, National Institute of Radiological Sciences, Isozaki 3609, 311-12 Nakaminato-shi, Ibaraki, (Japan) |
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Abstract: | A simple pre-irradiation procedure for the separation of iodine from soil has been developed. A soil sample was heated in a quartz tube for 15 min at about 900 °C. The evaporated iodine was collected in activated charcoal, which was produced from phenol resin with low impurities. The charcoal, with sorbed iodine, was irradiated by neutrons and the128I produced was measured. A successful elimination of the background radioactivity due to the matrix elements was possible with this separation procedure. The detection limit by this method for soil samples was about 0.1 mg/kg (dry). The method has been applied to analyze selected soil samples. |
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