Analysis of principle component and chemistry type of essential oil from Cinnamomum camphora leaf in Fujian Province

Principle component and cluster analyses on 21 main compositions(accounting for 90.735% of total content)in 329 samples of essential oil from Cinnamomum camphora(L.)Presl leaf from 28 counties in Fujian Province were conducted.Twelve principle component factors which the accumulative contribution rate reached to 84.342% were selected from 21 main compositions in essential oil.Variation status of 21 main compositions in essential oil could be explained with the 12 principle component factors.At λ=5.5,329 samples of leaf essential oil were clustered into five chemistry types:linalool-type,camphora-type,cineol-type,safrole-type and hybrid-type,and the main compositions of linalool-type,camphora-type,cineol-type and safrole-type were linalool,camphora,1,8-cineol and safrole respectively,while the hybrid-type had no distinct main composition.The main chemical compositions of leaf essential oil were obviously consistent in each chemistry type except the hybrid-type.