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Determination of uranium in ores using laser-induced breakdown spectroscopy combined with laser-induced fluorescence

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Abstract

The plasma emission spectrum of uranium in laser-induced breakdown spectroscopy (LIBS) is weak and susceptible to spectral interference, especially in a complex ore matrix. In this study, laser-induced breakdown spectroscopy combined with laser-induced fluorescence (LIBS-LIF) technology was proposed to enhance the spectral intensity of uranium in ores and eliminate spectral interference. Different combinations of excitation lines and analytical lines of the U element were investigated. In contrast with atomic lines, uranium ion lines are more suitable for determination of uranium. The relative number of U ions in plasma was studied for the best selection of excitation lines and analytical lines. The analytical performance of LIBS-LIF and LIBS for U determination in ores was compared. The results showed that all indicators had been significantly improved by LIBS-LIF. The slope, R2, LoD, RMSECV, ARE, and ARSD values of LIBS-LIF were 1.1 × 105 counts per wt%, 0.998, 35 μg g−1, 0.05 wt%, 6.69%, and 6.37%, respectively. This work demonstrates that LIBS-LIF has excellent potential in the exploration of uranium resources.

Graphical abstract: Determination of uranium in ores using laser-induced breakdown spectroscopy combined with laser-induced fluorescence

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Article information


Submitted
18 Dec 2019
Accepted
06 Feb 2020
First published
12 Feb 2020

J. Anal. At. Spectrom., 2020, Advance Article
Article type
Paper

Determination of uranium in ores using laser-induced breakdown spectroscopy combined with laser-induced fluorescence

Q. Li, W. Zhang, Z. Tang, R. Zhou, J. Yan, C. Zhu, K. Liu, X. Li and X. Zeng, J. Anal. At. Spectrom., 2020, Advance Article , DOI: 10.1039/C9JA00433E

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