摘要
目的考察不同干燥方法对银杏鲜叶中总黄酮醇苷和总萜类内酯含量的影响。方法分别采用直接烘烤、晒干后烘烤、杀青晾置后烘烤、微波和恒温鼓风等5种方法干燥银杏鲜叶,比较最佳干燥方法;考察不同温度对干燥结果的影响;用HPLC法测定干燥后各样品中总黄酮醇苷和总萜类内酯的含量并进行比较。结果 80℃时经上述5种方法干燥后,银杏鲜叶中总黄酮醇苷分别为0.60%、0.62%、0.73%、0.80%、0.85%,总萜类内酯分别为0.50%、0.55%、0.57%、0.65%、0.67%;经60、80、100、120、140、160℃恒温鼓风干燥后,银杏鲜叶中总黄酮醇苷分别为0.73%、0.85%、0.90%、0.93%、0.96%、0.77%;总萜类内酯分别为0.64%、0.67%、0.70%、0.74%、0.78%、0.69%。结论银杏叶的最佳干燥方法为恒温鼓风干燥;140℃为最佳干燥温度。
OBJECTIVE To investigate the effect on the contents of total flavonol glycosides and terpene lactones in Ginkgo biloba leaves with the different drying methods. METHODS Oven drying,oven drying after sun drying,green removing then oven drying after airing,microwave drying and constant temperature blast drying methods were used to dry Ginkgo biloba leaves. HPLC was used for quantitative analysis of the total flavonol glycosides and terpene lactones of the samples. RESULTS The contents of total flavonol glycosides in Ginkgo biloba leaves were 0. 60%,0. 62%,0. 73%,0. 80% and 0. 85%,respectively,the contents of total terpene lactones were 0. 50%,0. 55%,0. 57%,0. 65% and 0. 67%,respectively after the leaves dried at 80 ℃ by the above methods. The contents of total flavonol glycosides in Ginkgo biloba leaves were 0. 73%,0. 85%,0. 90%,0. 93%,0. 96% and 0. 77%,respectively. And the contents of total terpene lactones were 0. 64%,0. 67%,0. 70%,0. 74%,0. 78% and 0. 69%,respectively after the leaves dried by constant temperature blast drying at 60 ℃,80 ℃,100 ℃,120 ℃,140 ℃ and 160 ℃. CONCLUSION The best method to dry Ginkgo biloba leaves is constant temperature blast drying,and the optimal temperature of oven drying method is 140 ℃.
出处
《华西药学杂志》
CAS
CSCD
北大核心
2014年第6期678-680,共3页
West China Journal of Pharmaceutical Sciences
关键词
银杏叶
干燥
银杏黄酮醇苷
银杏萜类内酯
Ginkgo biloba leaves； Drying； Ginkgo flavonol glycosides； Ginkgo terpene lactones
