Principal Component Analysis on Aroma Constituents of Seven High-Aroma Pattern Oolong Teas

The principal component analysis method was used to analyse the aroma constituents of 7 high aroma pattern Oolong teas The results showed that each aroma pattern of the Oolong tea has its own importing aromatic material The aroma charasteristic was different when the aroma composing matter changed The aroma constituents expression patterns were listed for Rouguixiang tea, Yulanxiang tea, Huangzhixiang tea and Zhilanxiang tea