核分裂生成物の分離に関する研究 : 無担体放射性セシウムの調製

概要

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A method is presented for the preparation of carrier-free cesium tracer from old fission products. The method is based on the similarity in chemical behavior of ammonium and cesium ions. The carrier-free cesium is coprecipitated with ammonium phosphotungstate at first and several contaminants are removed by precipitating with lanthanum hydroxide. The active cesium is finally coprecipitated with platinic ammonium chloride and the precipitate is decomposed by igniting at 600°C, then the residue is digested with hydrochloric acid and the platinum metal is discarded by centrifuging. The carrier-free cesium tracer of high purity is thus prepared by this method and the tracer tests indicated to have an excellent purity free from other fission elements.
社団法人日本分析化学会の論文