Abstract
A simplified procedure for the colorimetric determination of iron in metallic uranium was proposed. Iron in uranium chloride solution of 7.5N hydrochloric acid was extracted into butyl acetate, and the solvent layer was washed twice with 7.5N hydrochloric acid. The same volume of methyl-isobutyl-ketone was added to the solvent, and the mixed solvent layer was shaken with 20% aqueous solution of ammonium thiocyanate. The color developed in the solvent layer was measured, using a 520 mμ filter. 120γ of iron in 0.11g of uranium could be determined with satisfactory results.
