ANALYSIS METHOD FOR TRACE URANIUM IN PLUTONIUM SOLUTION

摘要

PROBLEM TO BE SOLVED: To make analysis of trace uranium in a plutonium solution easily and in a short time so as to reduce the risk of a worker's external exposure and improve analysis accuracy. SOLUTION: Ascorbic acid is added to a plutonium solution containing trace uranium to adjust the valency of plutonium to be trivalent, and the uranium contained plutonium solution is poured in a column 14 for solid phase extract chromatography where CMPO extract solvent containing TBP is adsorbed to the solid phase taking silica gel as a medium to adsorb uranium to the column. After that, the column is washed with an ascorbic acid to completely remove plutonium, and then uranium adsorbed to the column is eluted by a mixed solution of sodium hydroxide and sodium carbonate, and the volume is determined by a dibenzolymethane solution to be measured by a spectrophotometer 24.