食品科学 ›› 2002, Vol. 23 ›› Issue (8): 274-276.

• 营养卫生 • 上一篇    下一篇

紫叶李提取物的抗氧化活性及稳定性研究

 胡迎芬, 孟洁, 胡博路   

  1. 青岛大学理工学院化学系
  • 出版日期:2002-08-15 发布日期:2011-12-31

 HU  Ying-Fen, MENG  Jie, HU  Bo-Lu   

  • Online:2002-08-15 Published:2011-12-31

摘要: 用30%乙醇提取紫叶李中的抗氧化物质,用化学发光法测定其抗氧化活性,并研究了光、热、pH等因素对抗氧化物质的影响。结果表明:紫叶李提取物对碱性连苯三酚体系产生的超氧阴离子自由基(O-2•)以及母体系产生的羟基自由基(•OH)有很好的清除作用,且耐热、耐光性好,在酸性介质中可稳定存在。

关键词: 紫叶李, 抗氧化活性, 稳定性

Abstract: Antioxidative substances of Pranus Cerasifera Ehrh Cv.Atropurpurca were extracted with 30% ethanol and theirantioxidative activities were essayed by Chemiluminescence. The effects of light, heat and pH on the stabilities of theseantioxidative substances were also studied . It was found that the extracts of Pranus Cerasifera Ehrh Cv.Atropurpurcashowed strong scavenging effects on the superoxidized anionic radical(O2-•)produced from alkaline hemimellitic acid systemand alsoen hydroxyl radical (•OH) produced by Vc-Cu-barm-H2O2 system, The estracts were resistant to heat and light andcould exist stably in acidic medium.

Key words: Pranus Cerasifera Ehrh Cv.Atropurpurca , Antioxidatibe actibity , Stability