摘要：Ultrasonic-assisted alcohol extraction process was applied to extract the total flavonoids of Torreya fargesii Franch., and the optimal extraction process was studied. Meanwhile, the extract solution was tested for its antioxidant activity. In this study, the extraction yield and antioxidant activity of TF from T. fargesii using ultrasound extraction (UE) is studied. Significant independent variables of the extraction, including ultrasonic power, ethanol concentration and extraction time, were optimized using the Box-Behnken (BB) method, and the optimal extraction conditions were obtained by response surface methodology (RSM). The extraction solution could effectively scavenge the two kinds of free radicals in a dose-dependent manner.
