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利用所建立的银杏叶药材中6种黄酮醇苷、5种萜类内酯、9种有机酚酸类共20个主要成分的含量测定方法,检测了不同来源银杏叶样品中这些成分的含量.运用统计学方法,分别对数据进行了相关性分析、主成分分析以及线性回归分析,明确了所测成分之间的相关关系,反映质量信息的主要成分组成以及主要成分之间存在的回归关系,最终确定对羟基苯甲酸、儿茶素、KRcG和银杏内酯A4个特征成分为分析指标,既能反映不同产地、不同树龄银杏叶药材的质量特征,又是相互有内在关联、能够体现银杏叶共性特征的指标成分,简化了质量控制指标,为全面、科学和经济地进行银杏叶整体质量控制提供了依据和可行模式.“,”In this paper,an HPLC-DAD-ELSD method was developed to determine main 20 components of Ginkgo biloba L.leaves from different ages and sources,including six flavonol glycosides,five terpene lactones and nine organic acids.Using statistics method and establishing relevant mathematics models,the measured data has proceeded correlation analysis,principal component analysis,and regression statistics and the results showed generality and specific characteristics.We defined p-hydroxybenzoic acid,catechinic,KRcG and ginkgolide A as characteristic indexes representing commonness and speciality of Ginkgo biloba L.leaf.The four characteristic indexes can reflect the quality of Ginkgo biloba L.leaf,and the internal relations between them are significant.The contents of other compounds could define the quantity relation with characteristic markers.It simplified the approach of quality control,and provided a basis for quality control of Ginkgo biloba L.