FIELD: radiation medicine. SUBSTANCE: method involves introducing aluminosilica gel of KSM ShSM trade mark (GOST 3956-54) into urine sample, making interaction of the sample with the aluminosilica gel, separating aluminosilica gel from urine and washing-out cesium-137 from aluminosilica gel with mononormal hydrochloric acid solution. To simplify the process, aluminosilica gel is used which graininess is 0.5 to 4-5 mm in the amount of 50-60 g per 1 l of urine. The urine sample is shaken with aluminosilica gel during 50-60 min. EFFECT: simplified method; enhanced sensitivity of analysis. 2 tbl
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