Separation and preconcentration of131I and131IO 3 in a liquid-liquid system

  • Š. Palágyi
Proceedings of the 12th Radiochemical Conference


The application of isotope exchange in a liquid-liquid system for the separation and preconcentration of131I and131IO3/− from water is described. For this purpose a solution of elemental iodine in tri-n-butyl phosphate diluted with toluene was used. The influence of various factors on the separation efficiency of131I was investigated. These are: time of the exchange, concentration of a carrier in the aqueous phase, concentration of I2 in the organic phase, volume ratio of the phases, pH, foreign ions, storage of the organic phase, etc. The method is quite rapid and the selective preconcentration of these chemical forms of radioiodine from water can be accomplished even in the presence of the most important fission products. This method makes also possible to separate these chemical forms from each other under controlled pH conditions. The activity of the separated radioiodine can be measured advantageously, e.g., by homogeneous liquid scintillation counting after decolourization of the organic phase.


Toluene Iodine Organic Phase Liquid Scintillation Scintillation Counting 
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Copyright information

© Akadémiai Kiadó 1991

Authors and Affiliations

  • Š. Palágyi
    • 1
  1. 1.Institute of Radioecology and Applied Nuclear TechniquesKošice(Czechoslovakia)

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