Separation of tervalent lanthanides from actinides by extraction chromatography

Journal Article · Tue Nov 30 23:00:00 EST 1982 · Anal. Chem.; (United States)

DOI:https://doi.org/10.1021/ac00251a033· OSTI ID:6923401

Martin, D B; Pope, D G

A procedure is described for the removal of milligram amounts of lanthanides from the tervalent actinides. The routine application of an earlier procedure resulted in low americium yields and poor resolution of the ) spectrum, mainly due to inadequate removal of neodymium. The reported procedure offers many significant improvements and involves prepurification of the lanthanide-actinide fraction by precipitation as a hydroxide, removal of the lanthanides from the tervalent actinides by extraction on a column of bis(2-ethylhexyl)-phosphoric acid sorbed on Teflon powder, and carrying the actinides directly from the eluate on about 50 ..mu..g of cerium fluoride for ) spectrometry. The actinide recovery from a mixture of 5 mg of cerium, 3 mg of lanthanum, and 2 mg of neodymium was 86% for californium and 96% for americium and curium, with less than 10 ..mu..g of the neodymium remaining. The average overall recovery of americium from routine analysis of 131 soil samples was 84 +/- 6%. 4 figures, 1 table.

• Research Organization: Radiological and Environmental Sciences Lab., Idaho Falls, ID
• OSTI ID: 6923401
• Journal Information: Anal. Chem.; (United States), Journal Name: Anal. Chem.; (United States) Vol. 54:14; ISSN ANCHA
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
400102* -- Chemical & Spectral Procedures
ACTINIDES
ALPHA SPECTRA
AMERICIUM
CALIFORNIUM
CERIUM
CHROMATOGRAPHY
CURIUM
ELEMENTS
EXTRACTION
EXTRACTION CHROMATOGRAPHY
LANTHANUM
METALS
NEODYMIUM
RARE EARTHS
SEPARATION PROCESSES
SOILS
SPECTRA
TRANSPLUTONIUM ELEMENTS
TRANSURANIUM ELEMENTS