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IC_(50)值分别为32.5±0.5、55.1±0.7、25.3±0.61μg/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.