Analysis of characteristics and differences of non-volatile components in different Wuliangye series Baijiu based on non-targeted metabonomics

The non-volatile components of five series of Baijiu (Wuliangye, Wuliang Chun (mellow), Wuliang Chun (spring), Wuliangtequ and Wuliangtouqu) were studied by non-targeted metabonomics, and their component characteristics and differences were analyzed. The results showed that 317 kinds of non-volatile compounds were detected in five series of Baijiu by liquid chromatography-mass spectrometry, including 296 kinds in Wuliangye, 275 kinds in Wuliang Chun (mellow), 293 kinds in Wuliang Chun (spring), 269 kinds in Wuliangtequ and 282 kinds in Wuliangtouqu. The number and composition of non-volatile compounds were different in the series of Wuliangye Baijiu. Wuliangye contains the most abundant non-volatile compounds, followed by Wuliangchun. The results of principal component analysis (PCA) results showed that Wuliangye and Wuliang Chun (spring) were significantly different from Wuliang Chun (mellow), Wuliangtequ and Wuliangtouqu in the first principal component. According to cluster analysis (CA), Wuliangye and Wuliang Chun (spring) were grouped together, while Wuliang Chun (mellow), Wuliangtequ, and Wuliangtouqu were grouped together. The difference of composition and contents of non-volatile component in different Wuliangye Baijiu was an important factor reflecting the quality of Baijiu, non-targeted metabonomics technology had good application in the analysis and identification of Baijiu characteristic components.