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采用 HPLC法测定银杏叶中白果内酯、银杏内酯 A、B、C的含量 ,并测出不同生长季节及生长年限的含量变化。结果表明 :总萜内酯含量在 8月份最高 ;幼树叶的含量明显高于老树 ,并伴随树龄的增长 ,总萜内酯含量逐渐下降
HPLC method was used to determine the contents of ginkgolide and ginkgolide A, B and C in Ginkgo biloba leaves, and the changes in the content of different growth seasons and growth years were measured. The results showed that the content of total terpene lactone was highest in August; the content of young leaves was significantly higher than that of old trees, and with the increase of tree age, the total terpene lactone content gradually decreased.