FRAP法测定大枣枣皮红色素的总抗氧化能力

Determination of Total Antioxidant Capacity of Red Pigments from Chinese Jujube Peel by the Ferric Reducing/Antioxidant Power Assay

采用FRAP法测定枣皮中红色素的总抗氧化能力,试验表明枣皮红色素具有一定的抗氧化活性.枣皮红色素的总抗氧化能力与其含量之间呈正相关性.通过溶剂分级萃取,将枣皮红色素分离成极性不同的成分,各极性成分的抗氧化能力与浓度之间呈依赖关系.由此可以考虑把大枣枣皮作为食品与化妆品等行业中的一种良好的天然色素和天然抗氧化剂资源.

The ferric reducing/antioxidant power（FRAP） assy was used to determine the total antioxidant capacity of red pigments from Chinese jujube peel.The results showed that the red pigments from Chinese jujube peel had cetain antioxidant activity.Furthermore,there was a positive correlation between the antioxidant capacity of red pigments and its content.Different polarity ingredients were separated from the red pigments in Chinese jujube peel with solvent fractionated extraction.And all of them appeared the concentration dependence with their content.The present study showed that the red pigments from Chinese jujube peel can be considered as a kind of good sources of natural pigments and natural antioxidants.