Coulometric Determination of Plutonium

A mechanistic study on the electrocatalysis of the Pu(iv)/Pu(iii) redox reaction at a platinum electrode modified with single-walled carbon nanotubes (SWCNTs) and polyaniline (PANI)

“…The coulometric technique on the platinum electrode with the reversible Pu(IV)/ Pu(III) couple in mineral acids is most frequently followed for the accurate determination of Pu. [1][2][3][4][5][6][7][8][9][10][11][12] 1-3 M sulphuric acid (H 2 SO 4 ), depending on the amount of Pu, gives satisfactory results by coulometry. However, the fouling of platinum electrodes is encountered very often because of its passivation by an oxide layer or due to the adsorption of some organic molecules present in the analyte solution.…”

Recent Developments and Current Problems in Inorganic Analytical Chemistry. Nuclear Materials

“…The lead reductor method ( 9) is usually used in lAr hydrochloric acid. It is principally used for the analysis of low-grade ores, but has been used in England (8) for the analysis of high-grade uranium products. Other studies (88) indicate its application to high concentrations of uranium.…”

“…By using samples of about 0.4 gram instead of the formerly employed milligram samples, the precision is increased to about 0.03%. Coulometric determination with electrolytically generated ferrous ion has been used for micro amounts (8).…”

Electroanalysis and Coulometric Analysis

“…Carson, Vanderwater, and Gile (19), and Brunstad (18), have given directions for the coulometric titration of plutonium with ferrous ion. Hetman (55) recommends the Oelsen, Haase, and Graue (120) method, w+ich employs a platinum cathode and an isolated zinc anode and requires no external current source for the generation of ferrous ion, for the coulometric titration of chromium and vanadium in steels.…”