山竹果皮植物多酚及其抗氧化活性研究

以山竹果皮为原料,分析山竹果皮中植物多酚的类型及含量,并对其抗氧化活性进行研究。研究结果表明,山竹果皮中含有缩合类植物多酚、水解类植物多酚和黄酮等多种多酚类物质。其中,总酚、原花青素以及总黄酮的含量分别为15·5%±1·9%、8·56%±1·40%和6·52%±2·14%。山竹果皮提取液经大孔树脂纯化后,40%乙醇洗脱相的抗氧化活性最强,对DPPH自由基、羟基自由基以及超氧阴离子的清除能力IC50值分别为32·5±0·5、55·1±0·7、25·3±0·6μg/mL。 

Study on the compositions and antioxidant activity of plant polyphenol from pericarp of Garcinia mangostana L

The Garcinia mangostana L pericarp was used as a raw material to study on the kinds, contents and antioxidant of plant polyphenol. The results showed that the Garcinia mangostana L pericarp was rich in polyphenol, such as condensed polyphenol, hydrolysable polyphenol and flavnoid. The contents of total polyphenol,procyanidins and total flavnoid are 15.5%±1.9% ,8.56%±1.40%, and 6.52% ±2.14%, respectively.The pericarp extract were purified by LSA-21, and the 40% alcohol elution had the strongest antioxidant activity.The IC_(50)value of DPPH · ,· OH and O_2~-· radical scavenging capabilities are 32.5±0.5,55.1±0.7,25.3±0.6μg/mL,respectively.