Difference of volatile aroma components of 9 kinds of Huangjiu from different producing areas by HS-SPME-GC-MS

In order to investigate the quality difference of Huangjiu from different producing areas, the volatile aroma components of 9 kinds of Huangjiu samples from different producing areas were analyzed by headspace solid phase microextraction gas chromatography-mass spectrometry (HS-SPME- GC-MS). The results showed that 109 kinds of aroma components were detected in Huangjiu from different producing areas, among which alcohols, esters and aldehydes were the basis of aroma. Based on the orthogonal partial least squares discriminant analysis (OPLS-DA) and cluster analysis, Huangjiu from different producing areas could be distinguished effectively, among which 7 kinds of difference aroma components could be used for producing areas identification of Huangjiu. Combined with the analysis of aroma activity value (OAV) and variable projection importance (VIP) value, 24 key aroma compounds (OAV>1) and 7 different aroma compounds (OAV>1, VIP>1) were screened, among which isoamyl acetate, ethyl benzoate, ethyl butyrate, ethyl caproate, 2,4- di-tert-butylphenol, phenylethanol and benzaldehyde contributed to the overall aroma of Huangjiu.