Analysis of main component and the essential oil chemotypes of Cinnamomum camphora in Guangxi

Through the 64 essential oil samples from different areas of Guangxi principal component analysis, five principal extracted components of major interrelated changes in chemical composition were evaluated. α-pinene and terpinen-4-ol played main role in the first main component, nerolidol and α-caryophyllene played main role in the second main component, eucalyptol and α-terpineol played main role in the third main component, camphor and linalool played main role in the fourth main component, and myrcenet played main role in the fifth main component. Combined with GC-MS analysis results, selected the Ward’s method and the squared Euelidean distance method for clustering analysis. The results showed that the essential oil of Cinnamomum camphorastem in Guangxi were clustered into five chemotypes (Num=22) :linalool type, nerolidol type, eucalyptol type, camphor type and the pinene-terpineol type. The linalool type were distributed most widely and linalool contented were the highest.