DETERMINATION OF SMALL AMOUNTS OF URANIUM IN MINERALS BY THE PHOSPHATE- VANADATE PROCESS

Journal Article · Fri May 01 04:00:00 EDT 1959 · Foton

OSTI ID:4195572

Pinto, C M; Moyses, E; Teixeira, E R

The phosphate-vanadate determination of uranium is based on the precipitation of uranium(IV) with sodium phosphate in acid solution and subsequent titration of uranium(IV) with vanadate ion in strong sulfuric acid solution. In the phosphate precipitation all elements are removed except zirconium, titanium, and thorium, and they do not interfere with the titration. In the process the ore is leached in hydrochloric acid, and sodium phosphate is added to the solution. The uranium is precipitated along with Zr, Ti, and Th, but all other elements remain in solution. The precipitate is then dissolved with sulfuric acid and titrated with ammonium metavanadate. The indicator used is N-phenylanthranilic acid. The results obtained show that the method is simple and precrise for the determination of small amounts of uranium in minerals and ores. (J.S.R.)

• Research Organization: Universidade de Minas Gerais, Brazil
• NSA Number: NSA-14-004327
• OSTI ID: 4195572
• Journal Information: Foton, Journal Name: Foton Vol. Vol: 1
• Country of Publication: Country unknown/Code not available
• Language: Portuguese

Related Subjects

ACIDS
AMINO ACIDS
AMMONIUM COMPOUNDS
ANTHRANILIC ACID
CHEMISTRY
HYDROCHLORIC ACID
MINERALS
ORES
ORGANIC ACIDS
PHENYL RADICALS
PHOSPHATES
PRECIPITATION
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
SODIUM PHOSPHATES
SOLUTIONS
SULFURIC ACID
THORIUM
TITANIUM
URANIUM
VANADIUM COMPOUNDS
VANADIUM OXIDES
ZIRCONIUM