关键词: 武夷岩茶, 质子传递反应-飞行时间质谱仪(PTR-TOF-MS), 气相色谱-质谱法(GC-MS), 香气成分

Abstract: The volatile compositions of two different cultivated varieties of Wuyi Rock Tea,which named Wuyi Rougui and Wuyi Shuixian,were analysised by proton transfer teaction-time of flight-mass spectrometry (PTR-TOF-MS ) and gas chromatography-mass spectrometry (GC-MS).The results show that,the volatile compositons of WuyiShuixian were mainly trans-nerolidol,(E,E) -2,4-heptadienal,linalool and its oxide,while there were trans-nerolidol,α-farnesene,benzaldehyde and its relative content in WuyiRougui.Meanwhile the concentration of m/z 207,223,281,291 were high in WuyiRougui.The compositions of volatile compounds detected in Wuyi Rock tea were great different by appling different analysis methods.It also indicated that the combination analysis was needed to provide a more complete and accurate results of the aroma.PTR-TOF-MS could be a good method to determine the aroma of tea leaves.

Key words: Wuyi rock tea, proton transfer reaction-time of flight-mass spectrometry(PTR-TOF-MS ), gas chromatography-mass spectrometry (GC-MS), aroma components