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】采用ＨＰＬＣ法对银杏叶黄酮醇甙和萜内酯等６种组分含量进行测定。结果表明，银杏总黄酮及槲皮素甙，山萘黄素甙，异鼠李素甙含量随叶的生长不断下降，到叶黄时略有上升。银杏萜内酯及白果内酯和银杏内酯Ａ，Ｂ随叶的生长，幼树叶含量开始缓慢上升，到叶黄时迅速下降，老树叶基本不变。综合两种有效成分变化规律，得出银杏叶最佳采叶时间为９月中旬至１０月初。
】 HPLC method for determination of flavonoid glycosides and terpene lactones and other six components of ginkgo biloba. The results showed that the content of ginkgo flavonoids, quercetin glycosides, kaempferide, isorhamnetin and glucagons decreased with the growth of leaves and rose slightly when leaves were yellow. Ginkgolides and bilobalide and ginkgolide A, B with the leaf growth, young leaves began to slowly rise, to the rapid decline in leaf yellow, the old leaves basically unchanged. Based on the changes of the two active ingredients, the best leafing time of Ginkgo biloba leaves was from mid September to early October.