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Abstract
A solvent-extraction method has been developed to separate uranium and plutonium from an aqueous solution containing phosphoric, sulfuric, and nitric acids by extracting them into 0.5 M TOPO in xylene followed by stripping with ammonium carbonate solution. In the case of plutonium, spectral evidence reveals that the complex species extracted into TOPO is predominantly the neutral nitrate complex of Pu(IV).