Abstract
A combined use of comparator instrumental neutron activation analysis (INAA) including the internal standard method and energy-dispersive X-ray fluorescence spectrometry (EDXRF) for the determination of 14 rare-earth elements (REE) in geological samples at the level of their clarke concentrations is studied. A rapid analysis with the determination of light REE from La to Sm with Fe as an internal standard is performed using a portable RLP-21T energy-dispersive X-ray fluorescence spectrometer (Republic of Kazakhstan) with the excitation of K-series lines of characteristic radiation of a sample with a low-power (10 W) X-ray tube with a tungsten anode and the maximum voltage 70 kV. The neutron activation analysis of other REE was performed using a WWR-K nuclear research reactor. Based on the analysis of ten certified reference materials of geological samples, a possibility of using a complex of INAA and EDXRF methods for routine qualitative analyses of REE in the III accuracy class in accordance with the branch standard OST41-08-212-04 is shown. Examples of using a complex of INAA and EDXRF methods for solving geochemical problems and determining REE in out-of-balance ores of the Kundybay deposit are presented.
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The work was performed within the Program of Targeted Support of the Ministry of Education and Science of the Republic of Kazakhstan (BR05236400).
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Translated by E. Rykova
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Silachyov, I.Y. Combination of Instrumental Neutron Activation Analysis with X-Ray Fluorescence Spectrometry for the Determination of Rare-Earth Elements in Geological Samples. J Anal Chem 75, 878–889 (2020). https://doi.org/10.1134/S106193482007014X
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DOI: https://doi.org/10.1134/S106193482007014X