苹果多酚体外抗氧化作用的研究

The efficiency of apple polyphenol as DPPH radical scavenger

介绍了苹果多酚的超声波提取方法，并通过DPPH法和2-脱氧-D-核糖法研究了苹果提取物的抗氧化性能。结果表明，苹果多酚清除DPPH自由基速度快，其抗氧化能力可与葡萄籽多酚相媲美。研究了其清除DPPH自由基的动力争陛质，并与茶多酚、葡萄籽多酚、BHT比较其抗氧化能力。同时，通过2-脱氧-D-核糖法可以看出：在一定浓度范围内，苹果提取物有很强的抗氧化能力，其最佳浓度范围为8～10mg／mL，此外，苹果提取物及葡萄籽提取物清除羟基自由基（·OH）的效果远远高于茶多酚。

This article introduced the ultrasonic wave extraction of polyphenols from apple, measured the effect of apple extracts on antioxidant activities by DPPH and deoxyribose method. The results showed that the scavenging action of DPPH radicals in apple polyphenols is strong , they have the same antioxidant activities with BHT. At the meantime, apple extracts had powerful antioxidant activities within certain concentration of 8 - 10mg/mL, In addition, apple extracts and grape seed extracts with proartthocyanidins and chlorogenic acid as main component showed much better antioxidant activities than tea polyphenol.