【摘要】 用正交实验探讨银杏叶中黄酮类化合物的最佳提取工艺。研究结果表明：在９０℃条件下用９倍于叶重体积的７０％乙醇回流提取４次，每次１ｈ，银杏叶黄酮糖苷提取效果最好，其平均浸出率可达（９５．６±１）％。分光光度法测总黄酮的回收率为１０２．８％，７次平行测定的相对标准偏差ＣＶ为０．４１％。更多还原

【Abstract】 The optimum extracting conditions of flavonoids in Ginkgo biloba L.were investigated by using the orthogonal design.The results showed that 90℃,9∶1 of 70% ethanol to Ginkgo biloba L.weight ratio,extraction for 4 times and lh for each time were optimal.The average extraction rate was as high as (95 6±1)%.The average recovery of total flavonoids determined by spectrophotometry was 102 8% and the coefficient of variation was 0 41%.更多还原