摘要
采用溶剂浸提法研究了提取温度、提取时间、提取剂浓度和料液比对麻疯树叶中多酚提取效果的影响，并研究了其抗氧化性。结果表明，麻风树叶多酚较佳提取条件为50%乙醇、料液比为1∶10、50℃水浴、提取时间为2h，多酚含量可达到15.37%。抗氧化性实验结果表明，麻疯树叶多酚对DPPH自由基清除率可达到60.72%，其抗氧化性高于抗坏血酸。
Abstract
Polyphenols were extracted from Jatropha curcas leaf by the traditional method of solvent extraction. A study was carried out on the effects of temperature, extraction time, solvent concentration and material-to-solvent ratio on the extraction rate of polyphenols, and their antioxidant activity was investigated. The results showed the optimum extraction conditions as follows: volume fraction of ethanol 50%, material-to-solvent ratio 1:10, 50℃ and extraction time 2h. The extraction rate of polyphenols reached 15.37 %. The results of the experiment on their antioxidant activity showed that the maximum DPPH scavenging rate by polyphenols was up to 60.72%, higher than that by ascorbic acid.
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