玉米须总黄酮的抗氧化性研究

Research of antioxidant activity of total flavonoids of corn silk

摘要: 以玉米须为原料,提取玉米须总黄酮。从玉米须总黄酮对猪油的抗氧化性、对DPPH自由基的清除作用、对Fe3+的还原能力三个方面系统分析了玉米须总黄酮的抗氧化活性。结果表明:添加玉米须总黄酮的猪油比未添加玉米须总黄酮的猪油氧化缓慢;玉米须总黄酮对DPPH自由基的IC50为0.057mg/mL,低于BHT的IC50（0.17mg/mL）;同浓度下,玉米须总黄酮对Fe3+的还原能力强于BHT。因此,玉米须总黄酮具有抗氧化作用,可以作为一种天然抗氧化剂应用于食品领域。

Abstract: 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.