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

Conference · Sat Jan 01 00:00:00 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 Laboratory (LANL), Los Alamos, NM (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5536785
• Report Number(s): LA-UR-83-2970; CONF-831025-15; ON: DE84001710
• Resource Relation: Conference: 26. ORNL-DOE conference on analytical chemistry in energy technology, Knoxville, TN, USA, 11 Oct 1983
• Country of Publication: United States
• Language: English

Related Subjects

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