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Multivariate Analysis Based on Geochemical, Isotopic, and Mineralogical Compositions of Uranium-Rich Samples
Open AccessArticle

Rare Earth Element Determination in Uranium Ore Concentrates Using Online and Offline Chromatography Coupled to ICP-MS

1
Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA
2
Chemistry Department, University of Missouri, Columbia, MO 65211, USA
*
Author to whom correspondence should be addressed.
Minerals 2020, 10(1), 55; https://doi.org/10.3390/min10010055
Received: 17 December 2019 / Revised: 3 January 2020 / Accepted: 4 January 2020 / Published: 8 January 2020
(This article belongs to the Special Issue Nuclear Forensic Applications in Geoscience and Radiochemistry)
The determination of trace elements, particularly rare earth elements, in uranium ore concentrates (UOCs) is important as the pattern can be indictive ore characteristics. Presented here is a methodology for accurately quantifying rare earth elements (REE) in UOCs. To improve the measurement uncertainty, isotope dilution mass spectrometry (IDMS) was utilized over other quantification techniques such as external calibration or standard addition. The isotopic determinations were measured by inductively coupled plasma-mass spectrometry (ICP-MS). To obtain high-fidelity isotopic measurements, separation of the REE from the uranium matrix was achieved by high-performance ion chromatography (HPIC), reducing the isobaric interferences. After separation, the target analytes were analyzed in two different modalities. For high precision analysis, the separated analytes were collected and measured by ICP-MS in an “offline” fashion. For a rapid approach, the separated analytes were sent directly into an ICP-MS for “online” analysis. These methods have been demonstrated to accurately quantify the REE content in a well-characterized UOC sample. View Full-Text
Keywords: uranium ore concentrate; ICP-MS; isotope dilution mass spectrometry; ion chromatography uranium ore concentrate; ICP-MS; isotope dilution mass spectrometry; ion chromatography
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Bradley, V.C.; Manard, B.T.; Roach, B.D.; Metzger, S.C.; Rogers, K.T.; Ticknor, B.W.; Wysor, S.K.; Brockman, J.D.; Hexel, C.R. Rare Earth Element Determination in Uranium Ore Concentrates Using Online and Offline Chromatography Coupled to ICP-MS. Minerals 2020, 10, 55.

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