DETERMINATION OF TRACE URANIUM IN PUREX AQUEOUS WASTE WITH ARSENAZO HI

摘要

A method was developed for determining trace uranium in aqueous wastes from processing nuclear reactor fuels. Uranium(VI) is determined colorimetrically with the metal indicator Arsenazo III, after removing fission product interferences by solvent extraction of ammonium nitrate solutions with tributyl phosphate in xylene. The range of the method is 0 to 5 ug uranium/ml in the final extraction, with a standard deviation of ±0.1 ug uranium/ml.