放射性指示作用に關する化學的硏究(第13報) : P³²,Br⁸⁰及びBr⁸²の製造について

Abstract

Authors prepared radioactive phosphorous (P32) as carrier free H3PO4 by the bombardment of neutron on CS2. The neutron source is the mixture of Ra 50 mg and Be. The method of extraction of H3PO4 is very simple and about 0.4μ. C. was obtained. And, recently, we prepared radioactive bromine (Br80, Br82) as NH4 Br by the bombardment of neutron on C2H5Br. In the method of extraction, we used the Szilard-Chalmer's method. We are endeavouring to increase the yield of Br80, 82 by the modification of bombardment method. These P33 and Br80, 82 are being used in our studies of analytical chemistry and others.