红背叶提取物的体外抗氧化活性

Study on the antioxidant activity of extracts from the leaves of Alchornea trewioides

采用DPPH法、FRAP法、ABTS法和清除羟基自由基法四种抗氧化活性方法,测定了红背叶不同溶剂萃取60%EtOH提取物得到的部位清除自由基的能力。结果表明,乙酸乙酯提取物的抗氧化能力最强,强于阳性对照VC和Trolox;其次是60%乙醇提取物,其抗氧化能力基本与阳性对照BHA相当。

Antioxidant activity of different solvents extracts fractions fractionated from 60% EtOH extracts of the leaves of Alchornea trewioides were evaluated by DPPH assay,FRAP assay,ABTS assay and scavenging the corresponding hydroxyl radical method.When compared with the positive control samples BHA,VC and Trolox,the determination results showed that antioxidant activity of EtOAc extracts fractions of the leaves of A.trewioides was the highest,its antioxidant activity was higher than VC and Trolox.Antioxidant activity of 60% ethanol extracts fractions was as much as BHA,but lower than VC and Trolox.