Chinese Journal of Applied Chemistry

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Partition Characteristics of Geniposide in Inducing Phase Separation of Acetonitrile Aqueous Solution System

SHENG Bi, CHEN Zhi, LI Hongzhou, CHEN Bo*   

  1. (Key Laboratory of Chemical Biology and Traditional Chinese Medicine Research of Ministry of
    Education,Hunan Normal University,Changsha 410081,China)
  • Received:2013-03-14 Revised:2013-04-24 Published:2014-02-10 Online:2014-02-10
  • Contact: CHEN Bo

Abstract: After geniposide in the acetonitrile aqueous extract solution of Gardenia was separated into two phases by inductors, the partition characteristics of it in two phases were studied. A new method was established for the separation and purification of geniposide. The types of inductors inducing phase separation of acetonitrile aqueous solution were researched in detail. The effects on partition characteristics of geniposide were analyzed via investigation of the composition proportion of inductors, the additive amount of inductors, the volume fraction of acetonitrile, the additive amount of sample and temperature. The results show that when inductors were added into the acetonitrile/aqueous(volume ratio 1∶1) extract at 25 ℃, the preliminary purification of geniposide could be finished by one step. The extraction yield of geniposide reaches 81.63% and the purity is increased from 3.05% primitively to 13.54%. The best inductors are composed of KCl and MgSO4(mass ratio 2∶1).

Key words: geniposide, gardenia, acetonitrile aqueous extract solution, inducing phase separation, separation and purification

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