中文摘要：

对刺五加叶总黄酮提取工艺进行了研究,同时利用1,1-二苯基-2-苦基苯肼自由基（DPPH）法和羟基自由基（OH）法对刺五加叶总黄酮提取物进行了的抗氧化评价。结果表明：超声提取法对刺五加叶总黄酮提取效果最佳。超声提取正交试验结果表明,刺五加叶总黄酮的最佳提取工艺为：以50%乙醇溶液提取,提取时间为1.5h,提取次数为2次,溶媒倍量为20倍,提取率为5.192%。抗氧化活性结果表明,刺五加叶总黄酮对DPPH和.OH均有良好的清除作用,且随着其浓度的增加,清除能力增强。

英文摘要：

Objective：The extraction methods of Flavonoids have been studied,and the extraction process has been optimized.And then,the antioxidant activity of total flavonoids extract against DPPH and hydroxyl radical has been evaluated.The experimental.Methods：Results：show that the ultrasonic extraction method is best by compared with the reflux method and accelerated solvent extraction and extraction,and the optimization extraction conditions are as follows：ethanol concentration is 50%,extraction time is 1.5h,extraction times is 2 times,solvent times is about 20 times.The extraction rate is 5.192%.The removal capacity of the extract on DPPH and OH radical is best.With the.Conclusion：increasing,the removal capacity is increasing.