Abstract
A rapid and specific method for the determination of131I in environmental water samples in the presence of some of the most important fission products is described. Radioiodine is separated from acidified water using tri-n-octylamine solution in toluene with dissolved iodine by one-stage static procedure with about 90% separation efficiency and 200-fold volume concentration. After the decolorization of the organic phase with NaOH in methanol, radioactivity of131I is counted by a toluene base liquid scintillator with a counting efficiency of 70%. The method is simple and enables to determine low radioactivity131I with a detection limit less than 5 pCi/1 in about 1.5 hrs.
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Palágyi, Š. Rapid determination of131I in environmental waters using a liquid anion exchanger. J. Radioanal. Chem. 29, 271–285 (1976). https://doi.org/10.1007/BF02520759
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DOI: https://doi.org/10.1007/BF02520759