班玛藏茶与云南普洱茶中咖啡因含量对比分析

摘要

[Objective]To determine caffeine content of Qinghai Banma Tibetan tea and Yunnan Pu''er tea.[Method]Caffeine was extracted by Soxhlet extraction method and make a rough evaluation for extracted caffeine.[Result]The average recovery rate and total caffeine content of Banma Tibetan tea were 36.3%,0.000 7 g,respectively.The average recovery rate and total caffeine content of Yunnan Pu''er tea were 34.3%,0.207 5 g,respectively.[Conclusion]Tea caffeine content are not identical in different habitats.%[目的]测定青海班玛藏茶和云南普洱茶茶叶中的咖啡因含量.[方法]采用索氏抽提法提取咖啡因,并对提取出的咖啡因含量进行粗略评价.[结果]班玛藏茶平均回收率为36.3%,咖啡因总量极少(0.000 7 g);云南普洱茶平均回收率为34.3%,咖啡因总量为0.207 5 g.[结论]不同生境的茶叶咖啡因含量各不相同.