SEPARATION OF URANIUM BY SOLVENT EXTRACTION WITH TRI-N-OCTYLPHOSPHINE OXIDE. DIRECT COLORIMETRIC DETERMINATION WITH DIBENZOYLMETHANE

Journal Article · Sat Nov 01 00:00:00 EST 1958 · Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed.

DOI:https://doi.org/10.1021/ac60143a017· OSTI ID:4285932

Horton, C A; White, J C

A simple, rapid method for the determination of uranlum in tmpure aqueous solutions was developed. Uranium(VI) is extracted by 0.1M tri-n- octylphosphine oxide in cyclohexane from a nltric acid solutton. A yellow color is formed in an aliquot of the organic extract by addition of dtbenzoylmethane and pyridine in ethyl alcohol. lnterference by cations ts minimized or elimtnated by selective reduction, by fluoride complexation, or by absorbance measurement at 416 m mu rather than 405 m mu , the wave length of maximum absorbance. Interference by excess fluoride or phosphate is eliminated by addition of aluminum nitrate before extraction. The range of the method ts 20 to 3000 gamma of uranium in the original solution, and the standard deviation is plus or minus 2%. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• Sponsoring Organization: USDOE
• NSA Number: NSA-13-001206
• OSTI ID: 4285932
• Journal Information: Analytical Chemistry (U.S.) Formerly Ind. Eng. Chem., Anal. Ed., Vol. Vol: 30; Other Information: Orig. Receipt Date: 31-DEC-59
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

CHEMISTRY
ABSORPTION
ALKYL RADICALS
ALUMINUM NITRATES
ANIONS
ARYL RADICALS
BENZOYL RADICALS
CATIONS
CHEMICALS
COLOR
COMPLEXES
COMPOUNDS
CYCLOALKANES
ERRORS
ETHANOL
FLUORIDES
HEXANE
IMPURITIES
INTERFERING ELEMENTS
LIGHT
METHANE
NITRIC ACID
ORGANIC COMPOUNDS
PHENYL RADICALS
PHOSPHATES
PHOSPHINES
PHOTOMETRY
PYRIDINES
QUALITATIVE ANALYSIS
QUANTITY RATIO
REDUCTION
SEPARATION PROCESSES
SOLUTIONS
SOLVENT EXTRACTION
SOLVENTS
SPECTROSCOPY
TOPO
TRACE AMOUNTS
URANIUM
URANIUM COMPOUNDS
WATER