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Current Analytical Chemistry

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ISSN (Print): 1573-4110
ISSN (Online): 1875-6727

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General Research Article

Rapid Determining Contents of the Rhubarb Anthraquinones Compounds by Support Vector Machine Modeling based on Near Infrared Spectra

Author(s): Linqi Liu, JInhua Luo, Chenxi Zhao*, Bingxue Zhang, Wei Fan and Fuyou Du

Volume 17, Issue 3, 2021

Published on: 17 March, 2020

Page: [396 - 407] Pages: 12

DOI: 10.2174/1573411016666200317111412

Price: $65

Abstract

Background: Measuring medicinal compounds to evaluate their quality and efficacy has been recognized as a useful approach in treatment. Rhubarb anthraquinones compounds (mainly including aloe-emodin, rhein, emodin, chrysophanol, and physcion) are the main effective components in purgating drug. In the current Chinese Pharmacopoeia, the total anthraquinones content is designated as its quantitative quality and control index, while the content of each compound has not been specified.

Methods: On the basis of forty rhubarb samples, the correlation models between the near infrared spectra and UPLC analysis data were constructed using support vector machine (SVM) and partial least square (PLS) methods, according to the Kennard and Stone algorithm for dividing the calibration/ prediction datasets. Good models mean they have high correlation coefficients (R2) and low root mean squared error of prediction (RMSEP) values.

Results: The models constructed by SVM have much better performance than those by PLS methods. The SVM models have high R2 of 0.8951, 0.9738, 0.9849, 0.9779, 0.9411, and 0.9862 that correspond to aloe-emodin, rhein, emodin, chrysophanol, physcion and total anthraquinones contents, respectively. The corresponding RMSEPs are 0.3592, 0.4182, 0.4508, 0.7121, 0.8365, and 1.7910, respectively. 75% of the predicted results have relative differences being lower than 10%. As for rhein and total anthraquinones, all of the predicted results have relative differences being lower than 10%.

Conclusion: The non-linear models constructed by SVM showed good performances with predicted values close to the experimental values. This can perform the rapid determination of the main medicinal ingredients in rhubarb medicinal materials.

Keywords: Near infrared spectroscopy, partial least square, rapid determining, rhubarb anthraquinones compounds, support vector machine, ultra performance liquid chromatography.

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