AI Article Synopsis
- A new method using near infrared (NIR) spectroscopy was developed to confirm the authenticity of bear bile powder and assess its purity in counterfeit products.
- The study analyzed NIR spectra from various bear bile and pig gall powder samples, successfully distinguishing between authentic and fraudulent products using principal component analysis (PCA) and a 95% accurate partial least squares discriminant analysis (PLS-DA).
- The PLS calibration model showed a strong predictive capability for assessing the bear bile content in counterfeits, suggesting this technique can be reliably used for identifying high-quality medicinal materials.
Article Abstract
A method based on the near infrared (NIR) spectroscopy was established for the authentication of bear bile powder and the quantitative analysis of the proportion in the counterfeits. The NIR spectra of 30 bear bile powder samples from 4 different origins, 6 pig gall powder samples, and 65 mixed samples of bear bile powder and pig gall powder with different proportions range from 0 to 100% were collected. The principal component analysis (PCA) was done and well-marked boundaries were observed between the bear bile and the counterfeits, also the bear bile samples from different origins. Partial least squares discriminant analysis (PLS-DA) was used to differentiate the bear bile and the counterfeits, and the rate of accuracy is 95%. Finally, the PLS calibration model was established for the quantitative analysis of the bear bile proportion in the counterfeits, the coefficient of determination of the prediction set is 0.9759, and the root-mean-square prediction error is 4.25%, which indicated that the result was satisfied. This research contributes to the rapid and undamaged identification of bear bile powder, and also offers reference for the quality identification of other expensive medicinal materials.
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