Selective separation of iodine by means of a crown ether and its use for the determination of 129I in aqueous solutions.

摘要

The invention relates to a process for the selective separation of iodine by means of a crown ether. BR/ According to this process, the iodine is extracted from an aqueous solution by dicyclohexyl-18-crown-6 (DC18C6) diluted in tetrachloroethane after adding to the solution a reducing agent, K + and Pd ions ( II). BR/ The selectivity is high. This method can therefore be used for the determination of iodine 129 in aqueous solutions resulting from the reprocessing of spent nuclear fuels. / P