Volumetric Determination of Uranium in the Presence of Niobium Utilizing a Bismuth Metal Reductor

Journal Article · Mon Jan 01 04:00:00 EST 1962 · Analytical Chemistry

DOI:https://doi.org/10.1021/ac60181a033· OSTI ID:4805839

Jaworowski, R. J.; Bratton, W. D.

The use of bismuth metal as a reducing agent during the determination of uranium in the presence of large amounts of niobium was studied. Other metals or metal amalgams reduce both uranium and niobium, prohibiting a simple volumetric deteimination. When a strongly acid solution bismuth metal, the uranium(VI) is quantitatively reduced formed and without encountering the problem of niobium hydrolysis. The uranium is determined indirectly by reaction with excess iron(III), producing iron(II) which is titrated with standard cerium(IV) solution. The end point with extraction of the cobalt--2-nitroso-1-naphthol complex into chloroform results in an accurate and reliable method of the titration is determined potentiometrically. Interferences were encountered with iron, molybdenum, vanadium, and tungsten in mixtures of uranium and niobium but not with nickel, zirconium, chromium, beryllium, copper, titanium, and aluminum.

• Research Organization: Pratt and Whitney Aircraft, CANEL, Middletown, Conn.
• Sponsoring Organization: USDOE
• NSA Number: NSA-16-005280
• OSTI ID: 4805839
• Journal Information: Analytical Chemistry, Journal Name: Analytical Chemistry Journal Issue: 1 Vol. 34; ISSN 0003-2700
• Publisher: American Chemical Society (ACS)
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

38 RADIATION CHEMISTRY, RADIOCHEMISTRY, AND NUCLEAR CHEMISTRY
ACIDITY
ALUMINUM
BERYLLIUM
BISMUTH
CHEMICAL REACTIONS
CHROMIUM
COPPER
ELECTRIC POTENTIAL
EXTRACTION COLUMNS
HYDROLYSIS
INTERACTIONS
IONS
IRON
MERCURY ALLOYS
METALS
MIXING
MOLYBDENUM
NICKEL
NIOBIUM
PERFORMANCE
POTENTIOMETRY
QUALITATIVE ANALYSIS
QUANTITATIVE ANALYSIS
REDUCTION
SOLUTIONS
STANDARDS
TITANIUM
TUNGSTEN
URANIUM
VANADIUM
VOLUME
ZIRCONIUM