Analysis of Chemical Components of Longjing Teas Prepared Using Various Tea Varieties

Longjing tea is a famous tea in China and it is major green tea products produced in Zhejiang Province.There are 3 kinds of Longjing tea(Xihu Longjing,Qiantang Longjing and Yuezhou Longjing) according to their producing areas.Qiantang Longjing tea in Fuyang City is usually produced using materials picked from tea varieties Longjing-43,Jiukeng and Wuniuzao.Chemical composition is important indicator for identifying quality and authenticity.Longjing tea samples were collected from tea gardens of tea varieties Longjing-43,Jiukeng and Wuniuzao were detected.It showed that chemical composition of tea samples prepared using the three varieties were quite similar.However,level of gallic acid decreased with picking time except for Wuniuzao,and caffeine and total catechins increased with increase in altitude.

Longjing tea is a famous tea in China and it is major green tea products produced in Zhejiang Province.There are 3 kinds of Longjing tea （Xihu Longjing,Qiantang Longjing and Yuezhou Longjing） according to their producing areas.Qiantang LonGing tea in Fuyang City is usually produced using materials picked from tea varieties Longjing-43,Jiukeng and Wuniuzao.Chemical composition is important indicator for identifying quality and authenticity.Longjing tea samples were collected from tea gardens of tea varieties Longjing-43,Jiukeng and Wuniuzao were detected.It showed that chemical composition of tea samples prepared using the three varieties were quite similar.However,level of gallic acid decreased with picking time except for Wuniuzao,and caffeine and total catechins increased with increase in altitude.