湖南安化茯砖茶与其他地区黑茶香味物质差异性研究

Study on the difference of aroma components between Anhua Fu brick tea in Hunan and dark tea in other areas

目的探讨湖南安化茯砖茶和其他不同地区黑茶样品香味物质差异。方法以湖南安化茯砖茶和广西六堡茶等其他5种不同地区黑茶样品为实验材料,运用顶空固相微萃取法,结合气相色谱-质谱联用技术,对黑茶样品香气成分进行分析、鉴定和定量,比较研究湖南安化茯砖茶与其他地区黑茶样品香味物质差异性。结果从湖南安化茯砖茶和其他不同地区5种黑茶中共鉴定出46种香气化合物,主要为醇类、酮类、醛类、芳香族类、萜烯类等;湖南安化茯砖茶香味物质以醇类、酮类和醛类为主,百分比含量分别达到43.74%、20.03%和12.83%,含量较高的成分是芳樟醇(34.67μg/L)、反式-β-紫罗兰酮(12.19μg/L)、己醛(6.07μg/L)和二氢猕猴桃内酯(4.97μg/L)。结论本研究进一步证实了湖南安化茯砖茶特有香味的主要香气成分是芳樟醇、反式-β-紫罗兰酮、己醛和二氢猕猴桃内酯等物质,为湖南安化茯砖茶的特征鉴别提供了一定的依据。

Objective To investigate the differences of aroma components between Fu brick tea in Anhua and other dark tea samples from different regions.Methods Using the dark tea samples from 6 different regions,such as Fu brick tea in Anhua and Liubao tea in Guangxi,as the experimental materials,the aroma components of the dark tea samples were analyzed,identified and quantified by headspace solid-phase micro-extraction combined with gas chromatography-mass spectrometry,the differences of aroma components between Fu brick tea and the other dark tea samples from other regions had been compared.Results A total of 46 aroma components were identified from Fu brick tea in Anhua and 5 kinds of dark tea from other regions,mainly including alcohols,ketones,aldehydes,aromatics and terpenes.Alcohols,ketones and aldehydes were the main aroma components in Anhua Fu brick tea,with the percentages of 43.74%,20.03%and 12.83%respectively.The higher content of Fu brick tea in Anhua were linalool(34.67μg/L),Trans-β-ionone(12.19μg/L),hexanal(6.07μg/L)and dihydrokiwifruit lactone(4.97μg/L).Conclusion This study further confirm that the main aroma components of Fu brick tea in Anhua are linalool,Trans-β-ionone,hexanal and dihydrokiwifruit lactone etc.It provides data support for characteristic identification of Fu brick tea in Anhua,Hunan.