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

Minerals

KayronT. Rogers¹  BrianW. Ticknor¹  VeronicaC. Bradley¹  ColeR. Hexel¹  BenjaminT. Manard¹  BenjaminD. Roach¹  ShalinaC. Metzger¹  SarahK. Wysor¹  JohnD. Brockman² 

[1] Chemical Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37830, USA;Chemistry Department, University of Missouri, Columbia, MO 65211, USA;

关键词: uranium ore concentrate;    icp-ms;    isotope dilution mass spectrometry;    ion chromatography;   

DOI  :  10.3390/min10010055

来源: DOAJ

【 摘 要 】

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.

【 授权许可】

Unknown