COLORIMETRIC DETERMINATION OF THORIUM WITH ARSENAZO III IN PRODUCTS CONTAINING NIOBIUM

Journal Article · Tue Nov 01 04:00:00 EST 1960 · Zavodskaya Lab.

OSTI ID:4102641

Vladimirova, V M; Davidovich, N K

Previous methods used for determining small amounts of thorium in materials containing large amounts of niobium involved its separation as fiuoride or oxalate. The reagent "arsenazo III" forms stable colored compounds with uranium and thorium, forming internal complexes which can be used for colorimetric determinations in the presence of fluorides, sulfates, etc., in highly acid solutions. The disturbing titanium and zirconium ions can be removed by adding a complexing agent to the solutlon. In a 3N HCl solution, in the presence of oxallc acid or of am monium oxalate, niobium did not intertere with the determination. A precision of 0.01% of thorium may be reached by the method. (TTT)

• Research Organization: State Scientific Research Institute of the Rare Metal Industry
• NSA Number: NSA-15-008764
• OSTI ID: 4102641
• Journal Information: Zavodskaya Lab., Journal Name: Zavodskaya Lab. Vol. Vol: 26
• Country of Publication: Country unknown/Code not available
• Language: Russian

Related Subjects

ACIDS
AMMONIUM COMPOUNDS
ARSENAZO
ARSENIC
CHEMISTRY
COLOR
COMPLEXES
DYES
FLUORIDES
HYDROCHLORIC ACID
IONS
MEASURED VALUES
NIOBIUM
ORGANIC COMPOUNDS
OXALATES
OXALIC ACID
QUANTITATIVE ANALYSIS
SOLUTIONS
SULFATES
THORIUM
TITANIUM
URANIUM
ZIRCONIUM