Comparison of aroma constituents between New Strains 308 and Tieguanyin Tea

The aroma constituents of New Strains 308 and Tieguanyin tea were determined by HS-SPME/GC- MS.Results showed that there were many differences in aroma constitutes between oriental-beauty tea and Tieguanyin tea.The aromatic compounds of New Strains 308 were much richer than those of Tieguanyin tea,and the contents of ketones,Esters and Olefinsare higher but the contents of Alcohols,Aldehydes,Alkanesand Nitrogenous compounds were lower than those of Tieguanyin tea.The major aromatic compounds of New Strains 308 were nerolidol( 19.25%),α- Farnesene( 16.17%),Indole( 13.1%) trans- β- ociene( 6.42%),1,7- Octadien- 3- one,2-methy-l6- methylene-( 4.39%),Hexanoic acid,3- hexenyl ester,( Z)-( 3.8%),α-- Bergamotene( 3.3%),cisJasmone( 2.03%),Nonanal( 1.94%),Benzeneacetaldehyde( 1.28%),Benzyl nitrile( 1.24%),Hexanoic acid,hexyl ester( 1.22%),Methyl salicylate( 0.92%) and so on.By sensory evaluation,we found that the score of New Strains308 were the same as Tieguanyin tea.However they had different aroma types,the Tieguanyin tea had the guanyin-flavor while the New Strains 308 tea had the jasmine-flavor.