Comprehensive evaluation on volatile components in ozone and ultraviolet combined treatment Lycium barbarum based on principal component analysis

In order to study on the effects of volatile components in ozone and ultraviolet combined treatment Lycium barbarum,the volatile components in samples with different processing methods were extracted by headspace- solid and analysis by gas chromatography mass spectrometry( GC- MS). The analysis and evaluation on the volatile components by the principal components analysis(PCA) and cluster analysis(CA).The results indicated that seventy-eight volatile components were identified from Lycium barbarum with different processing methods,including 14 kinds of esters,21 kinds of alcohols,16 kinds of olefins,15 kinds of ketones,5 kinds of aldehydes,3 kinds of acids,4 kinds of ethers and HCAS. Ten volatile components were common to these Lycium barbarum samples. PCA analysis identified 42 main volatile components. Combining with clustering analysis comprehensive evaluation that the flavor of volatile components descending order was after of combined treatment of Ozone and UV drying Lycium barbarum>after of combined treatment of Ozone and UV and vacuum dried Lycium barbarum>dried Lycium barbarum>fresh Lycium barbarum.