Controlled-potential-coulometric determination of uranium at a platinum electrode

Conference · Sat Jan 01 04:00:00 EST 1983

OSTI ID:5536785

Saponara, N M; Jackson, D D

A controlled-potential-coulometric method has been developed for determining uranium at a solid electrode which features high specificity and a precision of 0.1% relative standard deviation at the 5 mg uranium level. Uranium and added iron, necessary for the electrolytic oxidation of uranium, are reduced to U(IV) and Fe(II) with excess Cr(II). At a sequence of controlled potentials, the excess Cr(II) is oxidized to Cr(III), Fe(II) and U(IV) are oxidized to Fe(III) and U(VI), then the Fe(III) is reduced to Fe(II). The difference in the measured number of coulombs for the oxidation of Fe(II) and U(IV) and for the reduction of Fe(III) to Fe(II) is proportional to the quantity of uranium.

• Research Organization: Los Alamos National Lab., NM (USA)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5536785
• Report Number(s): LA-UR-83-2970; CONF-831025-15; ON: DE84001710
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ACTINIDES
CHEMICAL REACTIONS
CHROMIUM
ELECTRODES
ELEMENTS
IRON
METALS
OXIDATION
PLATINUM
PLATINUM METALS
REDUCTION
TRANSITION ELEMENTS
URANIUM
VOLTAMETRY