食品科学 ›› 2005, Vol. 26 ›› Issue (7): 102-105.

• 基础研究 • 上一篇    下一篇

枸杞子极性溶剂提取物的自由基淬灭性质

 钱建亚, 葛庆丰, 刘松, 翁利珍   

  1. 扬州大学食品科学与工程学院
  • 出版日期:2005-07-15 发布日期:2011-09-19

Free Radical Quenching Capability of Lycium chinense Mill Fruit Extracts

 QIAN  Jian-Ya, GE  Qing-Feng, LIU  Song, WENG  Li-Zhen   

  1. Department of Food Science and Technology, Yangzhou University
  • Online:2005-07-15 Published:2011-09-19

摘要: 根据我国食用枸杞子的习惯,对其水、50%和95%乙醇提取物的自由基淬灭能力进行了比较。水提物和50%醇提物中总黄酮的含量相近,分别为1154±89mg/kg和1207±66mg/kg,95%醇提物中含有更多的黄酮物质(1497±70mg/kg)。黄酮物质高效液相色谱分析结果说明,水提物中主要是芦丁和绿原酸,50%醇提物中主要是芦丁和原儿茶酸,95%醇提物中主要是芦丁。在DPPH•自由基反应体系中,所有提取物都表现为慢反应动力学,提取物的自由基淬灭能力随溶剂极性降低而提高。

关键词: 枸杞子, 自由基淬灭能力, DPPH&bull

Abstract: The extracts of Lycium chinense Mill fruits by water, 50% ethanol and 95% ethanol were compared in antiradical efficacy according to the Chinese consumption tradition. The results showed that water infusion was similar to 50% ethanol extractin flavonoids (1154±89mg/kg and 1207±66mg/kg, respectively), but 95% ethanol extract contained more flavonoids (1497±70mg/kg). The main flavonoids in Lycium chinense Mill fruits were rutin and chlorogenic acid in water extract, rutin andprotocatechuic acid in 50% ethanol extract and rutin in 95% ethanol extract respectively as assayed with high performancechromatography (HPLC). All extracts showed a slow kinetics in DPPH• antiradical reaction system. The antiradical efficacyof the extracts tended to become stronger as the polarity of the solvents became weaker.

Key words: boxthorn (Lycium chinense Mill), antiradical efficiency, DPPH•