罗汉果茎的不同部位提取物清除DPPH自由基的作用

Scavenging Effect on Radical DPPH By Different Parts of Extracts from Siraitia Grosvenorii Stems

目的:研究罗汉果茎的不同部位提取物清除二苯基苦基苯肼(2,2-diphenyl-1-picrylhydrazy1,DPPH)自由基的作用。方法:采用系统溶剂法将罗汉果茎的乙醇萃取物分成石油醚、乙酸乙酯、正丁醇及水四个部位提取物,采用二苯基苦基苯肼(DPPH)自由基体系法测定其抗氧化活性,并和没食子酸、抗坏血酸进行比较。结果:罗汉果茎的水部位提取物对DPPH的清除能力最强,其次为乙酸乙酯部位提取物、正丁醇部位提取物、石油醚部位提取物。结论:罗汉果茎的不同部位提取物均有抗氧化活性。其中水部位的抗氧化能力最强。

Objective： To study the scavenging activity of radical DPPH by different parts of extracts from the siraitia grosvenorii stems. Method： Divided the alcohol extract of the siraitia gTosvenorii stems into four parts including petroleum ether part,ethyl acetate part, n-butyl alcohol part and water part by systematic solvent. Determined the antioxidant activity of the four parts by radical DPPH systematic method,compared with gallic acid and ascorbic acid. Result： Scavenging activity of radical DPPH by the water part of extracts from the siraitia grosvenorii stems is the strongest,the ethyl acetate part, the n-butyl alcohol part and the petroleum ether part successively followed. Conclusion： Scavenging effect on radical DPPH by every part of extracts from the siraitia grosvenorii stems does exist, while the the water part has the strongest effect on it.