都匀毛尖茶维生素C含量的测定  

Determination of Vitamin C in Duyun Maojian Tea

作　　者：王玉林[1] 韦美玉[2] 宋丽莎[2] 龙应霞[2] 陈世军[2] 李静[2] 

机构地区：[1]黔南民族师范学院化学系,贵州都匀558000 [2]黔南民族师范学院生命科学系,贵州都匀558000

出　　处：《山东化工》2014年第12期82-84,共3页Shandong Chemical Industry

基　　金：贵州省科技厅都匀毛尖茶工程技术中心项目(黔科合农G[2010]字4001号)

摘　　要：为了探明优质名茶都匀毛尖茶维生素C含量,对都匀三个茶场的毛尖茶12个样本水浸出物,采用分光光度法和2,6-二氯酚靛酚法对茶汤维生素C含量进行测定,结果表明:三个茶场的毛尖茶水浸出物维生素C含量均高;低温贮藏比常温保存的茶叶维生素C含量高;维生素C含量随海拔高度而增多。维生素C通过浸泡从茶叶中释出进入茶汤构成优质名茶都匀毛尖茶。这两种方法简便易行。The research aimed to know the content of vitamin C in superior quality green tea named Duyun Maojian Tea, we used UV spectrophotometry and 2,6 -dichlorophenol -indophenol method to determine the content of Vitamin C in twelve samples of water extracts from Duyun three tea plantations. The result showed that the vitamin C content in Duyun Maojian Tea from these three tea plantations was rich, that the vitamin C content under cold storage all was higher than that under room temperature storage, and that the vitamin C content increased with altitude. Vitamin C was extracted from the tea by soaking. These two methods were simple and were applied to the direct determination of vitamin C content.

关 键 词：都匀毛尖茶 维生素C 分光光度法 2  6-二氯酚靛酚法 贮存条件 

分 类 号：O657.32[理学—分析化学]