Analysis of aroma components of two kinds of yellow tea by headspace solid phase microextraction coupled with gas chromatography- mass spectrometry

The aroma components of Junshanyinzhen yellow tea and Huoshanhuangya yellow tea were extracted by fully automated headspace solid- phase microextraction( HS- SPME),and were identified by gas chromatography- mass spectrometry( GC- MS). Then comparison of aroma components and contents between the teas was made.Results showed that a total of 75 aroma constituents were identified,their aromatic components were very similar and 66 of them were identical.Hydrocarbon and alcohol compounds were the major aromatic components in Junshanyinzhen yellow tea and Huoshanhuangya yellow tea,among hydrocarbon compounds representing 50.95%and 40.75% of the total peak area respectively.The major aromatic compounds of Junshanyinzhen yellow tea were tridecane,δ- cadinene,linalool,dihydroactinidiolide,geraniol,2,6,10,14- tetramethyl pentadecane,dodecane,etc,while the major aromatic compounds of Huoshanhuangya yellow tea were geraniol,tridecane,linalool,caffeine,δ- cadinene,dodecane,β- ionone,and dihydroactinidiolide,etc.