Liquid-liquid extraction separation and determination of plutonium and americium
A procedure is described for the determination of plutonium and americium after their initial separation on barium sulfate. The barium sulfate is dissolved in perchloric acid and the antinides and lanthanides are extracted into bis(2-ethylhexyl)phosphoric acid (HDEHP). Americium along with other tervalent actinides and lanthanides is stripped from HDEHP with nitric acid. The lanthanides are removed on a column of HDEHP supported on Teflon powder, and the americium and other tervalent actinides are electrodeposited for their determination by ..cap alpha.. spectrometry. The plutonium is stripped with nitric acid after reduction to the tervalent state with 2,5-di-tert-butylhydroquinone and electrodeposited for ..cap alpha.. spectrometry. Decontamination factors for plutonium and americium from each other and from other ..cap alpha.. emitters are 10/sup 4/ to 10/sup 5/. Two hours are required for the liquid-liquid extraction separations of plutonium and americium from eight samples. Recoveries of americium and plutonium through the HDEHP separatons are 99% and 95%, respectively.
- Research Organization:
- Dept. of Energy, Idaho Falls, ID
- OSTI ID:
- 6556163
- Journal Information:
- Anal. Chem.; (United States), Vol. 52:14
- Country of Publication:
- United States
- Language:
- English
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