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J Pharm Biomed Anal. 2018 Oct 25;160:64-72. doi: 10.1016/j.jpba.2018.07.036. Epub 2018 Jul 20.

Potential of near infrared spectroscopy and pattern recognition for rapid discrimination and quantification of Gleditsia sinensis thorn powder with adulterants.

Author information

1
Shenzhen Institute for Drug Control, Shenzhen 518057, China; School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China; Shenzhen Key Laboratory of Drug Quality Standard Research, Shenzhen 518057, China.
2
Shenzhen Institute for Drug Control, Shenzhen 518057, China; School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China.
3
Shenzhen Institute for Drug Control, Shenzhen 518057, China; Shenzhen Key Laboratory of Drug Quality Standard Research, Shenzhen 518057, China.
4
Shenzhen Institute for Drug Control, Shenzhen 518057, China.
5
School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China. Electronic address: bikaishun@126.com.
6
Shenzhen Institute for Drug Control, Shenzhen 518057, China; School of Pharmacy, Shenyang Pharmaceutical University, Shenyang 110016, China; Shenzhen Key Laboratory of Drug Quality Standard Research, Shenzhen 518057, China. Electronic address: szyjwtj@163.com.

Abstract

The Gleditsia sinensis Lam thorn (GST) is a classical traditional Chinese medical herb, which is of high medical and economic value. GST could be easily adulterated with branch of Rosa multiflora thunb (BRM) and Rosa rugosa thumb (BRR), because of their similar appearances and much lower cost for these adulterants. In this study Fourier transform near-infrared spectroscopy (FT-NIR) combined with chemical pattern recognition techniques was explored for the first time to discriminate and quantify of cheaper materials (BRM and BRR) in GST. The Savitzkye-Golay (SG) smoothing, vector normalization (VN), min max normalization (MMN), first derivative (1 st D) and second derivative (2nd D) methods were used to pre-process the raw FT-NIR spectra. Successive projections algorithm was adopted to select the characteristic variables and linear discriminate analysis (LDA), support vector machine (SVM), as while as back propagation neural network (BPNN) algorithms were applied to construct the identification models. Results showed that BPNN models performance best compared with LDA and SVM models for it could reach 100% accuracy for identifying authentic GST, and GST adulterated with BRM and BRR based on the spectral region of 6500-5500 cm-1 combined with 1 st D pre-processing. In addition, the BRM and BRR content in adulterated GST were determined by partial least squares (PLS) regression. The correlation coefficient of prediction (rp), root mean square error of prediction (RMSEP) and bias for the prediction by PLS regression model were 0.9972, 1.969% and 0.3198 for BRM, 0.9972, 1.879% and 0.05408 for BRR, respectively. These results suggest that the combination of NIR spectroscopy and chemometric methods offers a simple, fast and reliable method for classification and quantification in the quality control of the tradition Chinese medicine herb of GST.

KEYWORDS:

BPNN; Gleditsia sinensis thorn; LDA; Near-infrared spectroscopy; PLS regression; SVM

PMID:
30064041
DOI:
10.1016/j.jpba.2018.07.036
[Indexed for MEDLINE]

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