Chinese Journal of Quantum Electronics, Volume. 41, Issue 3, 496(2024)
Detection method of rare earth elements based on LIBS technology and multivariate linear calibration
Figures & Tables(10)
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
Table 1. Sample mixing ratio and element concentration
View tableView in ArticleTable 1. Sample mixing ratio and element concentration
Sample No. Raw material quality/mg Element concentration/% La2O3 Gd2O3 Y2O3 Yb2O3 CaCO3 La Gd Y Yb 1 106.67 40.00 93.33 10.00 3083.33 2.73 1.04 2.20 0.26 2 72.50 37.50 62.50 15.00 2312.50 2.47 1.30 1.97 0.53 3 43.33 30.00 36.67 15.00 1541.67 2.22 1.56 1.73 0.79 4 28.75 26.25 23.75 15.00 1156.25 1.96 1.82 1.50 1.05 5 20.00 24.00 16.00 15.00 925.00 1.71 2.08 1.26 1.32 6 19.62 31.15 15.00 20.77 1067.31 1.45 2.34 1.02 1.58 7 21.00 45.00 15.00 31.50 1387.50 1.19 2.60 0.79 1.84 8 23.57 75.00 15.00 51.43 1977.86 0.94 3.04 0.55 2.11 9 30.00 142.50 15.00 101.25 3461.25 0.68 3.30 0.31 2.37 10 25.00 165.00 10.00 150.00 4650.00 0.43 2.86 0.16 2.63 11 10.00 145.00 25.00 175.00 4645.00 0.17 2.52 0.39 3.07 12 15.00 97.50 30.00 142.50 3465.00 0.34 2.26 0.63 3.34 13 15.00 49.29 23.57 70.71 1984.29 0.60 2.00 0.87 2.90 14 15.00 30.00 21.00 37.50 1396.50 0.85 1.74 1.10 2.20 15 15.00 19.62 19.62 25.38 1074.23 1.11 1.47 1.34 1.93 16 17.14 15.00 21.43 18.21 999.64 1.36 1.21 1.57 1.49 17 25.91 15.00 31.36 17.73 1273.64 1.62 0.95 1.81 1.14 18 41.25 15.00 48.75 15.00 1755.00 1.88 0.69 2.05 0.70 19 75.00 15.00 90.00 15.00 2805.00 2.13 0.43 2.36 0.44 20 140.00 10.00 175.00 10.00 4665.00 2.39 0.17 2.76 0.18
Table 2. Selection of spectral lines for multiple linear regression
View tableView in ArticleTable 2. Selection of spectral lines for multiple linear regression
Model Selected La spectral line/nm Selected Gd spectral line/nm Selected Y spectral line/nm Selected Yb spectral line/nm Unary 394.91 342.25 437.49 369.42 Binary 394.91
433.37
342.25
376.84
437.49
324.23
369.42
328.94
Ternary 394.91
433.37
412.32
342.25
376.84
335.05
437.49
324.23
371.03
369.42
328.94
289.14
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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
Paper Information
Category: Special Issue on Key Technologies and Applications of LIBS
Received: Jan. 29, 2024
Accepted: --
Published Online: Jul. 17, 2024
The Author Email: XU Zhishuai (2367985761@qq.com)
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