FIELD: chemical industry. SUBSTANCE: irradiated yttrium is dissolved in nitric acid, separable elements are converted into solution from complex compounds such as citraves or carbonates, radionuclide Sr-89 is sorbed on ampholyte, sorbent is washed with complexing agent solution and radionuclide Sr-89 is sorbed with acetic acid solution. Invention makes it possible to increase degree of cleaning carrier-free radionuclide Sr-89 from yttrium. EFFECT: more efficient isolation method. 3 cl, 3 tbl
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