ZHANG Shi-zhi,WANG Ru,ZHAO Yu-xia,ZHANG Ming-jin.Discrimination Analysis of Qingke Liquor by Using Ultra-Violet Spectroscopy Combined with Chemometrics[J].Journal of Instrumental Analysis,2025,44(06):1107-1114.
ZHANG Shi-zhi,WANG Ru,ZHAO Yu-xia,ZHANG Ming-jin.Discrimination Analysis of Qingke Liquor by Using Ultra-Violet Spectroscopy Combined with Chemometrics[J].Journal of Instrumental Analysis,2025,44(06):1107-1114. DOI: 10.12452/j.fxcsxb.25012461.
Discrimination Analysis of Qingke Liquor by Using Ultra-Violet Spectroscopy Combined with Chemometrics
Qingke liquor,a renowned Tibetan alcoholic beverage derived from hull-less highland barley exclusively cultivated in the Qinghai-Tibetan Plateau,has witnessed a surge in sales. However,the issue of adulteration has emerged as a pressing concern demanding immediate attention. The research focused on the rapid identification methods of 'Huzhu' brand Qingke liquor,a geographical indication protection product,using ultra-violet(UV) spectroscopy. Two approaches were proposed:principal component analysis-support vector machine(PCA-SVM) and multi-model partial least squares-discriminant analysis(MPLS-DA). Three categories of liquors are considered:Chinese 'Huzhu' Qingke liquor(CHQL),other brand Qingke liquor(OBQL),and non-Qingke-based liquor(NQBL). SVM was performed using two principal components to solve the binary classification problem,while PLS1 algorithm is used for each col
umn of the dummy variable
Y
in MPLS-DA to integrate prediction results from submodels. Both PCA-SVM and MPLS-DA successfully built discrimination models for CHQL. PCA-SVM distinguishes CHQL from OBQL and NQBL but cannot differentiate between OBQL and NQBL. In contrast,MPLS-DA correctly identified all three classes of samples,and it could solve multi-classification problems. These results demonstrate that the proposed method can serve as a simple and rapid identification approach for CHQL,with MPLS-DA exhibiting superior sample recognition capabilities.
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