Abstract
Caffeine is the main component and characteristic indicator of tea beverages, and it is also a stimulant of the central nervous system. In this paper, the content of caffeine in tea beverage samples in the market were determined by the methylene chloride method, which was convenient, rapid, effective and low cost. The results showed that caffeine was detected in all samples as an inherent component of tea itself. The content of caffeine in the tea samples are vary because of different type of raw tea and the difference in the production process and formula , the caffeine content of the beverages from different manufacturers of the same tea varieties was also signicantly different.
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