Acta Optica Sinica, Volume. 38, Issue 12, 1214002(2018)
Comparative Analysis of Multiple Chemometrics Methods in Application of Laser-Induced Breakdown Spectroscopy for Quantitative Analysis of Soil Elements
Figures & Tables(6)
Fig. 2. Prediction results of different models at different analysis lines. (a) Ni I 325.074 nm; (b) Ni II 237.542 nm; (c) Ni I 236.063 nm; (d) Ni I 234.554 nm
Fig. 3. Relative error of different analysis linesat different models. (a) Ni I 325.074 nm; (b) Ni II 237.542 nm; (c) Ni I 236.063 nm; (d) Ni I 234.554 nm
Table 1. Mass fraction of Ni in soil samples
View tableTable 1. Mass fraction of Ni in soil samples
No. Component Mass fraction of Ni /% 1 GBW07419 23 2 GBW07419+GBW07421 23 3 GBW07421+GBW07419+GBW07429 29 4 GBW07419+GBW07429 32 5 GBW07421+GBW07406+GBW07419 33 6 GBW07406+GBW07419 38 7 GBW07406+GBW07421 39 8 GBW07406+GBW07419+ GBW07429 41 9 GBW07429 47 10 GBW07406 53 11 GBW07421 38 12 GBW07421+GBW07429 23 13 GBW07421+GBW07406+GBW07429 32 14 GBW07406+GBW07429 39
Table 2. RSD of predictionresults of different analysis lines at different models
View tableTable 2. RSD of predictionresults of different analysis lines at different models
Analysis line Sample type SVM RVM LSSVM No.1 0.078331766 0.069484786 0.063353712 Ni I 325.074 nm No.2 0.327015859 0.370529072 0.369579787 No.3 0.134049695 0.119152063 0.113113412 No.4 0.045626873 0.059786687 0.056680080 No.1 0.055388923 0.027927783 0.036459557 Ni II 237.542 nm No.2 0.387722461 0.388598652 0.070682570 No.3 0.162162162 0.175858956 0.178807775 No.4 0.094787448 0.085921251 0.087760117 No.1 0.059213249 0.028762770 0.049861180 Ni I 236.063 nm No.2 0.387722461 0.388217219 0.387763344 No.3 0.208301069 0.192003561 0.107019250 No.4 0.027694462 0.039633940 0.032492220 No.1 0.057332982 0.048396426 0.049712195 Ni I 234.554 nm No.2 0.387722461 0.388460378 0.429558531 No.3 0.387722461 0.387353854 0.032203699 No.4 0.110777846 0.085874842 0.026812435
Table 3. Global root mean square error and correlation coefficient of different analysis lines at different models
View tableTable 3. Global root mean square error and correlation coefficient of different analysis lines at different models
Model Index Ni I 325.074 nm Ni I 234.554 nm Ni I 236.063 nm Ni II 237.542 nm SVM GRMSE 0.160223059 0.07521398 0.096879896 0.279897941 R 20.7556 0.8375 0.9395 0.845 RVM GRMSE 0.114970284 0.065471404 0.069524404 0.274357387 R 20.878 0.9952 0.9839 0.9927 LSSVM GRMSE 0.101048052 0.351988197 0.069065764 0.139595171 R 20.8783 0.9125 0.9784 0.9919
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Luna Ying, Weidong Zhou. Comparative Analysis of Multiple Chemometrics Methods in Application of Laser-Induced Breakdown Spectroscopy for Quantitative Analysis of Soil Elements[J]. Acta Optica Sinica, 2018, 38(12): 1214002
Paper Information
Category: Lasers and Laser Optics
Received: Jun. 8, 2018
Accepted: Jul. 20, 2018
Published Online: May. 10, 2019
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