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  • 1 The Boris Kidrič Institute of Nuclear Sciences Chemical Dynamics Laboratory P.O.Box 522 11001 Beograd (Yugoslavia)
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A method for quantitative determination of uranium in phosphoric acid and wet phosphoric acid has been developed. After reduction with Fe, uranium(IV) is extracted with a kerosene solution of octylphenylphosphoric acid. The uranium was stripped with 10M H3PO4, containing H2O2, and then determined spectrophotometrically with Arsenazo III and by direct uranium(IV)-phosphoric acid solution measurements.