title: Spectral Interference Elimination in Soil Analysis Using Laser-Induced Breakdown Spectroscopy Assisted by Laser-Induced Fluorescence.
abstract: The complex and serious spectral interference makes it difficult to detect trace elements in soil using laser-induced breakdown spectroscopy (LIBS). To address it, LIBS-assisted by laser-induced fluorescence (LIBS-LIF) was applied to selectively enhance the spectral intensities of the interfered lines. Utilizing this selective enhancement effect, all the interference lines could be eliminated. As an example, the Pb I 405.78 nm line was enhanced selectively. The results showed that the determination coefficient (R2) of calibration curve (Pb concentration range = 14-94 ppm), the relative standard deviation (RSD) of spectral intensities, and the limit of detection (LOD) for Pb element were improved from 0.6235 to 0.9802, 10.18% to 4.77%, and 24 ppm to 0.6 ppm using LIBS-LIF, respectively. These demonstrate that LIBS-LIF can eliminate spectral interference effectively and improve the ability of LIBS to detect trace heavy metals in soil.
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Rongxing
authors.initials: R
authors.lastname: Yi
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Jiaming
authors.initials: J
authors.lastname: Li
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Xinyan
authors.initials: X
authors.lastname: Yang
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Ran
authors.identifier: 0000-0003-4854-8975
authors.initials: R
authors.lastname: Zhou
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Huiwu
authors.initials: H
authors.lastname: Yu
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Zhongqi
authors.initials: Z
authors.lastname: Hao
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Lianbo
authors.initials: L
authors.lastname: Guo
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Xiangyou
authors.identifier: 0000-0001-7079-1061
authors.initials: X
authors.lastname: Li
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Xiaoyan
authors.initials: X
authors.lastname: Zeng
authors.affiliation: Wuhan National Laboratory for Optoelectronics (WNLO), Huazhong University of Science and Technology (HUST) , Wuhan, Hubei 430074, P. R. China.
authors.forename: Yongfeng
authors.initials: Y
authors.lastname: Lu