1962 Volume 35 Issue 2 Pages 237-239
144Ce was extracted with acetylacetone in a benzene or in a carbon tetrachloride solution by shaking for 3 min. at a pH range of 4∼9. Though an oxidizing agent such as bromate was not always necessary, the presence of bromate makes the time for extraction shorter. Decontamination from other fission products, 90Sr (90Y), 106Ru, 137Cs, and rere earths (e.g.,152,154Eu), expect 95Zr (95Nb), was found to be negligible. The contamination of 95Zr (95Nb)) was reduced to a negligible amount by repeating the cycle of extraction and stripping or by masking 144Ce with thiocyanate. The separation of 144Ce from fission products with acetylacetone was attempted. 144Pr with a radio-chemical purity of more than 99% was easily obtained by washing the organic phase with an acetate buffer solution of pH 5∼8.
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