FIELD: chemistry.
SUBSTANCE: invention can be used in analytical chemistry and radiochemistry. A working solution is prepared, having acidity in the interval 0≤pH≤2 and overall concentration of organic acids and salt thereof not more than 0.1 mol/l and the working solution is brought into contact with an extraction agent. The extraction agent used is di-(2-ethylhexyl)phosphoric acid with weight ratio of the main substance of not less than 98% or solution thereof in an organic diluent. The extract is washed with a solution of mineral acid or a mixture of mineral acid and its salt with 0≤pH≤2. Re-extraction of the desired tin radionuclides is carried out with a solution of mineral or organic acid, or mixtures thereof or mixtures of said acids and salts thereof.
EFFECT: invention enables extraction of tin radionuclides from water-salt solutions.
12 cl, 8 tbl, 10 ex
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