正交优化-微波辅助提取银杏叶黄酮

采用微波萃取银杏叶黄酮类化合物,与传统溶剂萃取黄酮类化合物方法相比较,微波萃取法具有萃取时间短、溶剂用量少、耗能低、萃取效率高等优点。通过单因素实验和正交试验结果,确定提取的最佳条件为：温度55℃,功率800W,液固质量比70∶1,处理时间6min,提取率可达3.578%。在相同温度下,微波法与索氏提取法相比,微波法所需时间是索氏提取的1/80;溶剂下降30%,而且提取率增大。微波提取技术用于银杏叶中黄酮的提取具有省时、高效、节能等特点。

Optimization of Microwave-Ultrasound Assisted Extraction of Flavonids from Ginkgo Biloba Leaves by Orthogonal Design

The microwave extraction method,compared to the traditional solvent extraction methods for extraction of flavonoids from Ginkgo biloba leaves showed many advantages,such as short extraction time,less solvent and low energy consumption,and high extraction efficiency.The optimal extraction conditions were as follows：temperature of 55℃,power of 800W,liquid-solid mass ratio of 70∶1,the extraction time of 6min and extraction rate of 3.578% by single factor experiments and orthogonal test results.The microwave method compared with Soxhlet extraction,extraction time was shorted to 1/80,solvent was decreased by 30%,and the extraction rate was increased at the same temperature.Microwave extraction technology for extracting flavonoids from Ginkgo biloba is a time-saving,high efficiency,energy conservation method.