Study on extraction technology of total flavonoids from banana peel and its antioxidant activity

The total flavonoids were extracted from the banana peel and its antioxidant activity were researched.On the basis of single-factor experiments,the extraction technology of total flavonoids from banana peel was optimized by using an orthogonal experiment. The results showed that the optimal process conditions were ethanol concentration 80%,extraction temperature 90℃,the ratio of solid to liquid 1∶30(g/mL),extraction time30 min,under these conditions,the yield of total flavoniods was 6.93%. The scavenging effects of the total flavonoids on·OH were significant and the total flavonoids also had a strong total reducing power in the certain concentration range,which could be used as natural antioxidant in the future.