天然产物研究与开发 ›› 2014, Vol. 26 ›› Issue (6): 830-833.

• 研究论文 • 上一篇    下一篇

1-辛基-3-甲基咪唑二氰铵盐/硫酸铵双水相体系分离纯化银杏黄酮

许雪磊,李芬芳*,谭志坚   

  1. 中南大学化学化工学院,长沙 410083
  • 出版日期:2014-06-28 发布日期:2014-11-12

Extraction and Purification of Ginkgo biloba Flavonoids Using [C8 mim][N(CN)2]/(NH4)2SO4 Aqueous Two-Phase System

XU Xue-lei, LI Fen-fang*, TAN Zhi-jian   

  1. School of Chemistry and Chemical Engineering,Central South University,Changsha 410083,China
  • Online:2014-06-28 Published:2014-11-12

摘要: 建立了由亲水性离子液体1-辛基-3-甲基咪唑二氰铵盐([C8 mim][N(CN)2])和(NH4)2SO4形成的双水相萃取体系并应用于银杏黄酮的分离纯化研究。研究了盐浓度、体系温度、pH值、NaCl量等因素对银杏黄酮萃取效率的影响;并对下相中无机盐进行回收。体系由18.52% [C8 mim][N(CN)2],25.93% (NH4)2SO4构成,加入 1.5 mmol NaCl,在室温下进行萃取时萃取效率最佳,在最佳的条件下[C8 mim][N(CN)2]/(NH4)2SO4体系对银杏黄酮的萃取效率达96.73%。与传统的双水相体系相比,该体系的萃取效率高,粘度低,同时(NH4)2SO4的回收率达90.54%。[C8 mim][N(CN)2]/(NH4)2SO4双水相体系是一种很好的分离纯化银杏黄酮的方法。

关键词: 离子液体, 双水相体系, 硫酸铵, 银杏黄酮

Abstract: A new method for the extraction and purification of Ginkgo biloba flavonoids in an aqueous two-phase system (ATPS) formed from hydrophilic ionic liquid [C8 mim][N(CN)2](1-octyl-3-methylimidalium dicyanamide) and phase-forming salt (NH4)2SO4 was studied in this study.The effects of concentration of salt, temperature of system,pH value,amount of electrolyte of NaCl on extraction efficiency were investigated.The parameters influencing the recovery efficiency of (NH4)2SO4 were investigated.(NH4)2SO4 can be recovered from salt solution with higher recovery efficiency.When the ATPS contained 18.52% [C8 mim][N(CN)2]and 25.93% (NH4)2SO4,and 1.5 mmol NaCl was added at 298.15 K with pH being not adjusted,the extraction efficiency was 96.73%.IL/salt ATPS had higher extraction efficiency and lower viscosity than other ATPSs.When adding 2 volumes of methanol, (NH4)2SO4 can be recovered 90.54%.ATPS based on [C8 mim][N(CN)2]/(NH4)2SO4 was a good method on extraction and purification of Ginkgo biloba flavonoids.

Key words: ionic liquid;aqueous two-phase system;(NH4)2SO4, Ginkgo biloba flavonoids

中图分类号: 

R283.5