Research of antioxidant activity of total flavonoids of corn silk

The total flavonoids was extracted from corn silk.The antioxidant activity of total flavonoids were evaluated by the following three method: the antioxidant activity of lard oil,the DPPH radical scavenging,reducing capacity for Fe3 +.The results indicated that total flavonoids had a slower oxidation than that not added corn total flavonoids in lard oil.The IC50 of DPPH radical scavenging from total flavonoids was 0.057 mg /mL,which was lower than BHT's IC50( 0.17mg/mL).Under the same concentration,the Fe3 +reduction capacity of total flavonoids was stronger than BHT.Therefore,the total flavonoids had antioxidant effects,could be used as a natural antioxidant in the food sector.