Determination of thorium and uranium in ultrapure lead by inductively coupled plasma mass spectrometry

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DOIResolve DOI: http://doi.org/10.1021/ac048539t
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TypeArticle
Journal titleAnalytical Chemistry
ISSN0003-2700
Volume77
Issue8
Pages24322436; # of pages: 5
AbstractA method for the determination of U and Th at sub-ppt levels in high-purity Pb samples using extraction chromatography with ICPMS detection is described. Following acid digestion, uranium and thorium are separated from the lead matrix using UTEVA resin. Sorption and elution procedures were optimized, the potential reusability of the chromatographic resin was evaluated, and a performance comparison between prepacked and freshly prepared UTEVA column was made. Uranium could be eluted with 0.025 M HCl and Th then recovered using 0.5% oxalic acid. Recovery yields for U exceed 80% whereas those for Th were typically 60%. Procedural detection limits of 0.5 and 1.5 pg g-1 were obtained for U and Th, respectively. For purposes of comparison, GD-MS analysis of samples was also performed, yielding results consistent with those generated by ICPMS but with inferior detection power.
Publication date
LanguageEnglish
AffiliationNRC Institute for National Measurement Standards; National Research Council Canada
Peer reviewedYes
Identifier10308271
NRC number1283
NPARC number8898902
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Record identifier96474616-5f4e-4a67-b2ca-d08f94726305
Record created2009-04-22
Record modified2016-05-09
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