Zhishuai XU, Yihao XIAO, Li LIU, Zhongqi HAO. Detection method of rare earth elements based on LIBS technology and multivariate linear calibration[J]. Chinese Journal of Quantum Electronics, 2024, 41(3): 496
- Chinese Journal of Quantum Electronics
- Vol. 41, Issue 3, 496 (2024)
Fig. 1. Schematic diagram of the LIBS experimental device
Fig. 2. Variation of spectral line intensity (a), SNR (b) with defocus distance
Fig. 3. Variation of spectral line intensity (a) and SNR (b) with acquisition delay time
Fig. 4. Variation of spectral line intensity (a), SNR (b) with pulse energy
Fig. 5. Selected characteristic spectral lines of La (a), Gd (b), Y (c), Yb (d)
Fig. 6. Relationship between La predicted and reference values of LIBS
Fig. 7. Correlation coefficients of multiple linear regression equations
Fig. 8. Variation of RMSE of multiple linear regression models of four rare earth elements
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Table 1. Sample mixing ratio and element concentration
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Table 2. Selection of spectral lines for multiple linear regression
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