苦丁茶冬青与大叶冬青苦丁茶提取物体外抗氧化活性比较研究

Comparative Evaluation of Antioxidant Activity in vitro of Aqueous Extracts from Ilex kudingcha C.J. Tseng and Ilex latifolia Thunb Leaf Teas

比较苦丁茶冬青苦丁茶和大叶冬青苦丁茶提取液中多酚、黄酮的含量及体外抗氧化能力,结果表明:多酚含量高的苦丁茶冬青苦丁茶比黄酮含量高的大叶冬青苦丁茶具有较高的体外抗氧化能力;对5种体外抗氧化活性评价方法之间的相关性进行分析,表明各抗氧化方法间相关性良好(R2>0.8478),尤以DPPH自由基法与ABTS+·法的相关性最高(R2=0.9967)。

The contents of polyphenols and flavonoids and the antioxidant activities in vitro of aqueous extracts from the leaf teas of Ilex latifolia Thunb and Ilex kudingcha C.J. Tseng were determined. It was found that the aqueous extract from Ilex kudingcha C.J. Tseng had both higher polyphenol content and in vitro antixodiant performance than that from Ilex latifolia Thunb. The correlation analysis among five antioxidant evaluation methods in vitro demonstrated that there was a good correlation among them （R2 0.8478）, and the correlation between DPPH and ABTS＋ free radical scavenging assays was the most significant （R2 = 0.9967）.