天然产物研究与开发 ›› 2011, Vol. 23 ›› Issue (2): 275-278.

• 研究简报 • 上一篇    下一篇

大孔吸附树脂对苜蓿皂苷的吸附和解吸附作用

王蓟花1,周雨凡2,贺 伟2,韩建国3,玉 柱3,周立刚1*   

  1. 1中国农业大学农学与生物技术学院,北京100193;2北京林业大学林学院,北京100083;3中国农业大学动物科技学院,北京100193
  • 收稿日期:2010-07-30 出版日期:2011-04-25 发布日期:2011-10-14
  • 通讯作者: lgzhou@cau.edu.cn

Adsorption and Desorption of Alfalfa (Medicago sativa L.) Saponins by Macroporous Resin

WANG Ji-hua1 , ZHOU Yu-fan2, HE Wei2, HAN Jian-guo3, YU Zhu3, ZHOU Li-gang1*   

  1. 1College of Agronomy and Biotechnology, China Agricultural University, Beijing 100193, China; 2College of Forestry, Beijing Forestry University, Beijing 10083, China; 3College of Animal Science and Technology, China Agricultural University, Beijing 100193, China
  • Received:2010-07-30 Online:2011-04-25 Published:2011-10-14
  • Supported by:

    This work was co-financed by the grants from the Commonweal Fund of China Agriculture (nyhyzx07-022), the National Key Technology R&D Program of China (2006BAD16B08), and the Introducing International Advanced Agricultural Project of the Ministry of Agriculture of China (2006-G38).

摘要:

采用5种不同极性的树脂(AB-8、S-8、NKA-9、D-101和X-5)来评价对苜蓿皂苷的吸附和解吸附作用,其中中等极性的AB-8树脂对苜蓿皂苷具有最大的吸附量,用55%~65%的乙醇溶液能有效地将吸附的皂苷洗脱下来。当苜蓿粗提物量和AB-8树脂量为1:1时,树脂的吸附量达到饱和。采用AB-8树脂,用90%乙醇洗脱,苜蓿提取物的最大解吸附量为108.4 mg/g干重树脂。通过大孔树脂吸附和解吸附,将90%乙醇洗脱液浓缩,皂苷含量(53%)是苜蓿粗提物含量(5.68%)的9倍。结果表明,AB-8大孔吸附树脂可用于苜蓿皂苷的大规模制备。

关键词: 紫花苜蓿, 皂苷, 大孔吸附树脂, 吸附, 解吸附

Abstract:

Five types of macroporous adsorption resins namely AB-8,S-8,NKA-9,D-101 and X-5 with varying polarity were evaluated for the adsorption and desorption of alfalfa saponins. Of these,the moderately polar AB-8 resin showed the highest adsorption capacity and the absorbed saponins could be eluted effectively with 55-65% aqueous ethanol. The adsorption reached saturation at 1:1 alfalfa extract to AB-8 resin mass ratio. The maximum desorption capacity of alfalfa extract was 108.4 mg/g dw AB-8 resin on a column eluted by 90% aqueous ethanol. The saponin content in the concentrated 90% aqueous ethanol effluent reached 53%,about 9 times of that (5.68%) in the crude alfalfa extract. The AB-8 macroporous resin has may be a favorable sorbent for large-scale saponin isolation from alfalfa.

Key words: Medicago sativa, saponins, macroporous resin, adsorption, desorption