Microwave-assisted extraction of flavonoids from peanut hull and its antioxidant activity

The conditions of extracting flavonoids from peanut hull and the antioxidant activity of flavonoids were discussed.The results showed that the raw material was first soaked in 80% ethanol for 1 h at 65℃,then extracted with the assistance of microwave.The optimum conditions of microwave-assisted extraction were as follows:ratio of solid mass to liquid volume 1∶30,microwave power 515 W,irradiation time 120 s.Under these conditions,the extraction rate was 83.7%.The extract had strong ability of the clearance of free radical and certain antioxidant activity.