洋葱中黄酮类化合物体外抗氧化活性研究

Study on Antioxidant Activity in Vitro of Onion Flavonoids

通过测定洋葱中黄酮类化合物对Fe2+的螯合能力,对DPPH自由基、亚硝酸盐的清除能力,对卵黄脂蛋白脂质过氧化及油脂过氧化的抑制作用,研究了其体外抗氧化活性。结果表明:洋葱中黄酮类化合物对Fe2+具有很强的螯合能力,对DPPH自由基、亚硝酸盐具有良好的清除能力,对卵黄脂蛋白脂质过氧化及油脂过氧化具有明显的抑制作用,即洋葱中黄酮类化合物具有良好的体外抗氧化活性。

The antioxidant activity in vitro of onion flavonoids was investigated by measuring its scavenging activity on DPPH, nitrite, its chelating activity on Fe^2＋ , its inhibitory effect on peroxidation of yolk lipoprotein and oil. The results show that onion flavonoids posses strong chelating activity, good DPPH radical scavenging activity and nitrite scavenging activity, significant inhibitory effect on peroxidation of yolk lipoprotein and oil, namely onion flavonoids have good antioxidant activity in vitro.