Abstract
For the separation of metallic ions, stearic acid was introduced as a new extraction reagent. Solid low-melting point reagent such as stearic acid was expected to simplify the procedure of solvent extraction of metallic elements especially of radioactive isotopes and to do the disposal of radioactivity in the wastes. The extraction can be carried out by adding a solid stearic acid to the sample solution heated above its melting point (71 un. Concent 85% C) and by separating the solid stearic acid after being vigorously shaken with the solution and being left standing to solidify at room temperature. The extractabilities of fission products such as Sr/sup 90/-Y/sup 90/ Ce/sup 144/-Pr/sup 144/, Ru/sup 106/ -Rh/sup 106/, and al so of nonactive ferric iron and cupric copper were investigated as functions of pH. It was concluded that the above elements except Ru were extracted almost completely from the solution at pH around 7. (auth)
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