Effects of experimental parameters on elemental analysis of coal by laser-induced breakdown spectroscopy |
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| Authors: | Jie Li Jidong Lu Zhaoxiang Lin Shunsheng Gong Chengli Xie Liang Chang Lifei Yang Pengyan Li |
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| Institution: | aState Key Laboratory of Coal Combustion, Huazhong University of Science and Technology, Wuhan 430074, China;bLaboratory for Laser Spectrum Research, South-Central University for Nationalities, Wuhan 430074, China;cWuhan Institute of Physics and Mathematics, Chinese Academy of Sciences, Wuhan 430071, China |
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| Abstract: | The purpose of this work is to improve the precision of the elemental analysis of coal using laser-induced breakdown spectroscopy (LIBS). The LIBS technique has the ability to allow simultaneous elemental analysis and on-line determination, so it could be used in the elemental analysis of coal. Organic components such as C, H, O, N and inorganic components such as Ca, Mg, Fe, Al, Si, Ti, Na, and K of coal have been identified. The precision of the LIBS technique depends strongly on the experimental conditions, and the choice of experimental parameters should be aimed at optimizing the repeatability of the measurements. The dependences of the relative standard deviation (RSD) of the LIBS measurements on the experimental parameters including the sample preparation parameters, lens-to-sample distance, sample operation mode, and ambient gas have been investigated. The results indicate that the precision of LIBS measurements for the coal sample can be improved by using the optimum experimental parameters. |
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| Keywords: | Laser-induced breakdown spectroscopy Coal Experimental parameter |
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