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

被引:33
作者
Li, Qingzhou [1 ]
Zhang, Wen [1 ]
Tang, Zhiyang [1 ]
Zhou, Ran [1 ]
Yan, Jungle [1 ]
Zhu, Chenwei [1 ]
Liu, Kun [1 ]
Li, Xiangyou [1 ]
Zeng, Xiaoyan [1 ]
机构
[1] Huazhong Univ Sci & Technol, Wuhan Natl Lab Optoelect, Wuhan 430074, Hubei, Peoples R China
基金
中国国家自然科学基金;
关键词
SOIL; CLASSIFICATION; SAMPLES;
D O I
10.1039/c9ja00433e
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
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, R-2, LoD, RMSECV, ARE, and ARSD values of LIBS-LIF were 1.1 x 10(5) counts per wt%, 0.998, 35 mu g 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.
引用
收藏
页码:626 / 631
页数:6
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