本研究对2011～2014年生产的20个帝泊洱茶珍样品进行分析，建立了帝泊洱茶珍高效液相色谱指纹图谱，同时结合化学计量学对帝泊洱茶珍和竞品茶珍进行区分。结果表明：指纹图谱相似性分析，帝泊洱茶珍相似系数均大于0.995，而10个竞品茶珍相似度均小于0.970。通过系统聚类和偏最小二乘判别分析，可明显区分帝泊洱茶珍和竞品茶珍。变量投影重要性准则研究显示，没食子酸（GA）、3号峰（未知物）、没食子儿茶素（GC）、儿茶素（C）和表没食子儿茶素没食子酸酯（EGCG）等5种化合物相对含量的不同是区分帝泊洱茶珍与竞品茶珍主要因素。%In this study, 20 batches Deepure instant pu-erh tea samples from 2011-2014 were evaluated by using high liquid chromatography (HPLC) ifngerprint. Meanwhile, the Deepure instant pu-erh tea samples were authenticated within different manufacturers by chemometrics method. The chemometrics method included hierarchical clustering analysis, partial least squares-discriminant analysis and variable importance for the project analysis. Results showed that the similarities of 20 batches of instant pu-erh tea samples were more than 0.995, and the 10 similar products were lower than 0.970. The Deepure instant pu-erh tea samples and similar products can be signiifcantly distinguished by hierarchical clustering analysis, partial least squares-discriminant analysis. The results of variable importance for the study showed that ifve compounds were the important factors for discrimination of samples.
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