黑茶挥发性化学成分的研究

Study on Volatile Constituents in Dark Green Tea

实验采用水蒸汽蒸馏-溶剂萃取法和同时蒸馏-萃取法提取黑茶中挥发性物质,测得用两种方法提取的黑茶挥发油含量分别为2.02%和2.34%;采用GC-MS法从黑茶挥发油中分别分离并确定出28种和17种化学成分,分别占黑茶挥发油总检出量的86.16%和90.59%。用峰面积归一化法通过化学工作站数据处理系统,得出各化学成分在挥发油中的相对百分含量。

Direct distillation extraction method （DDE） and simultaneous distillation extraction method （SDE） were used for extracting the volatile substances of dark green tea. The average oil yields obtained by DDE method and SDE method are 2.02% and 2.34 % respectively. 28 chemical components and 17 chemical components are identified by gas chromatographymassspectrometry （GC-MS） method respectively. The contents of the identified compounds account for 86.16 % and 90.59 % of the total volatile substances detected respectively.