研究多酚类捕获自由基的能力,要从两方面考虑。一是与自由基的反应速度,二是抗氧化剂抑制自由基的量。多酚类的一个特点是具有多个酚羟基,在自由基捕获中具有多个活性位点,可能捕获多个自由基。因此,讨论儿茶素抗氧化能力时,既要考虑到捕获到的活性氧的量,又要考虑到反应速度。本次将DPPH作为活性自由基,并用分光光 To study the ability of polyphenols to capture free radicals, from two aspects to consider. First, the reaction rate with free radicals, the second is the amount of antioxidants to inhibit free radicals. A characteristic of polyphenols is that they have multiple phenolic hydroxyl groups, multiple active sites in free radical trapping, and the possibility of capturing multiple free radicals. Therefore, to discuss the antioxidant capacity of catechins, it is necessary to take into account the amount of reactive oxygen species captured, but also taking into account the reaction rate. This DPPH as active free radicals, and the use of spectroscopy