期刊
OPTIK
卷 156, 期 -, 页码 834-840出版社
ELSEVIER GMBH
DOI: 10.1016/j.ijleo.2017.12.050
关键词
Terahertz spectroscopy; Rapid measurement; Harmful additives; Variable importance in the projection
类别
资金
- Guangxi Colleges and Universities Scientific Research [KY2015LX297]
In this study, terahertz (THz) spectroscopy was used in combination with an improved partial least squares (PLS) method to quantitatively determine the harmful additives Auramine 0 in medicinal herb Pollen Typhae. A terahertz time-domain spectroscopy (THz-TDS) transmission system was built to collect the absorbance spectra, and stacked partial least squares based on variable contribution sorting (VIP-SPLS) was used to establish the correlation between the absorbance and the content of Auramine O. Compared with original PLS and SPLS, VIP-SPLS obtained a better performance. The results in this study indicated that THz spectroscopy combined with VIP-PLSR has a potential for the rapid and non-destructive prediction of harmful additives residue. (C) 2017 Elsevier GmbH. All rights reserved.
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