【摘要】 目的:为充分利用龙眼叶植物资源,避免资源的浪费,探讨龙眼叶总黄酮的提取及鉴别方法。方法:采用超声波乙醇浸提法从龙眼叶中提取黄酮类物质,对所提取的黄酮类物质进行验证,并用紫外分光光度法测定含量。结果:测得样品中总黄酮的含量C=0.9090 mg/ml,回收率为100.9%,其纯度和产率均较高。结论:该方法采用全物理过程,无任何污染,是提取龙眼叶黄酮类物质的有效途径。更多还原

【Abstract】 In order to make use of the resources of longan leaves,avoid wasting and approach the extraction of total flavanone of longan leaves. Methods: The flavonids were extracted by ethanol as the solvent from longan leaves with ultrasonic wave and ethanol extraction.Using spectrophotometry to extract and check the flavanone of longan leaves.Results: By this method getting the density of the total flavanone of longan leaves is C=1.0571 mg/ml and the rate of recovery is 101.3%.Conclusion: This text provides the extraction and purifying methods to get the outcome and the purity of the flavanone are all very high.This method is a purely physical process and has not any pollution.It is an ideal way to extract the flavanone of longan leaves.更多还原