基于高效液相色谱的西湖龙井茶鉴别方法

Identification Method of Xihu Longjing Tea Based on HPLC

通过高效液相色谱法分析50份龙井茶叶样品中21个特征峰,利用主成分分析,建立区分西湖龙井(XHLJ)与非西湖区龙井茶(NXHLJ)的方法。结果表明,通过主成分分析,提取出3个主成分,累计贡献率为91.3%,21个特征峰中EGCG和CAF的影响因素相对较大。

The contents of 21 characteristic peaks in 50 Longjing tea samples were measured by high-performance liquid chromatography（HPLC）. Then the method for distinguishing Xihu Longjing（XHLJ） and non-Xihu Longjing（NXHLJ） was established based on principal component analysis（PCA）. The results showed that 3 principal components could be extracted through principal component analysis,the cumulative contribution rate was 91.3%, and the most important factors in the 21 characteristic peaks were EGCG and CAF.