Abstract: | Uranium(VI) can be quantitatively precipitated by N-benzoylphenylhydroxylamine at pH 5.4. The precipitate is weighed after ignition to U3O8, or directly as U02(C13H10O2N)2. Cerium(III). thorium, lead and bismuth can be masked with magnesium-EDTA complex. Iron(IlI), titanium (IV) zirconium and molybdenum(Vl) and small amounts of aluminium can be precipitated with the reagent and filtered before uranium(Vl) is determined in the filtrate by proper adjustment of acidity. Fluoride, carbonate and organic acids interfere. |