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Proceedings Paper

A novel calibration transfer method of NIR spectra to identify ultra-low concentration of pesticide residues
Author(s): Chaowei Zhuang; Jingtao Fan; Jing Zhang; Bin Gao; Qionghai Dai
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Paper Abstract

Conventional chemical methods to detect pesticide residue are complex, and need professional instruments as well as much time. NIR spectral analysis provides an effective way for pesticide residue detection because of simple operation, rapid analysis and non-destruction of samples. However, conventional calibration models are only effective after spectra were measured, and different models are needed for different instruments. In this study, we propose a novel calibration transfer method by using sequential forward selection to transfer calibration models between different crops and instruments. The calibration model built by master instrument can identify three kinds of pesticide including Chlorothalonil, Chlorpyrifos and Buprofezin. Spectra obtained by slave instrument can also be predicted by the models with the method. The experiment results show that the prediction accuracies increased from 50% up to 80% by using our method.

Paper Details

Date Published: 18 November 2019
PDF: 8 pages
Proc. SPIE 11189, Optical Metrology and Inspection for Industrial Applications VI, 1118916 (18 November 2019); doi: 10.1117/12.2534019
Show Author Affiliations
Chaowei Zhuang, Tsinghua Univ. (China)
Jingtao Fan, Tsinghua Univ. (China)
Jing Zhang, Tsinghua Univ. (China)
Bin Gao, Tsinghua Univ. (China)
Qionghai Dai, Tsinghua Univ. (China)
Zhejiang Future Technology Institute (China)

Published in SPIE Proceedings Vol. 11189:
Optical Metrology and Inspection for Industrial Applications VI
Sen Han; Toru Yoshizawa; Song Zhang; Benyong Chen, Editor(s)

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