【摘要】 采用高效液相色谱方法分别建立信阳毛尖7个等级茶汤滋味特征指纹图谱。基于15种特征成分,采用判别分析技术对2个系列41个信阳毛尖茶样进行了良好的等级判别,判别正确率近100%;通过建立7种指纹图谱相似度计算方法发现,各相似度计算方法均能反映茶叶等级间的差异大小,其中以新改良程度相似度法最佳。采用相似度计算方法对茶叶分等定级的结果与其实际等级相一致,并可实现对等级差异的量化分析。更多还原

【Abstract】 High performance liquid chromatography(HPLC) fingerprints of seven grades of Xinyang Maojian tea were established using 41 samples. Based on 15 characteristic ?avor components found in all samples, discriminant analysis(DA)was used to differentiate between grades of Xinyang Maojiao tea with nearly 100% accuracy. All seven ?ngerprint similarity calculation methods employed could re?ect the difference between grades of tea, while the new improved extent similarity method was proved to be the best. The results of similarity calculation in grading of tea were consistent with the actual grades and allowed quanti?cation of the difference between grades of tea.更多还原