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| Quantitative Analysis of Laser-Induced Breakdown Spectroscopy Phosphate Concentrate Slurry Based on UVE Method and Partial Least Squares |
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Received:June 22, 2022
Revised:July 01, 2022
Accepted:July 01, 2022
Published Online:February 23, 2023
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| DOI： |
| KeyWord:laser induced breakdown spectroscopy;uninformative variable elimination;partial least squares;phosphate slurry;variable selection |
| Author | Institution |
| fangshengnan |
BGRIMM MTC TECHNOLOGY CO.,LTD. |
| shiyehong |
BGRIMM MTC TECHNOLOGY CO.,LTD. |
| hanpengcheng |
BGRIMM MTC TECHNOLOGY CO.,LTD. |
| zhaozhen |
BGRIMM MTC TECHNOLOGY CO.,LTD. |
| lihuachang |
BGRIMM MTC TECHNOLOGY CO.,LTD. |
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| Abstract: |
| The spectrum of phosphorus concentrate slurry was collected by laser-induced breakdown spectroscopy (LIBS) technology , and the wavelength variables related to P element were screened out based on the uninformative variable elimination (UVE) method, and then the selected wavelength was used as an independent variable to establish a partial least squares (PLS) regression model, which is compared with traditional full-spectrum PLS and GA-PLS calibration models. Compared with full-spectrum PLS, the UVE-PLS calibration model performs better, because its root mean square error of prediction (RMSEP) is decreased from 0.38% to 0.26%, and the coefficient of determination (R2) increased from 0.59 to 0.72. Compared with the GA-PLS calibration model, UVE method can overcome the lack of randomness in parameter selection of GA. The selected variables are only 8.76% of the full spectrum, and the calculation speed is faster, and the analysis accuracy is also better than the GA-PLS model. |
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