Abstract: To isolate lower polar terpenoids and lipophilic components from aerial part of Andrographis paniculata and Rabdosia rubescens,from leaves of Ginkgo biloba and Eriobotrya japonica by polyamide column chromatography,using the ethanol-water system.The result showed that lipophilic pigment could safely and effectively be taken off,and the lower polar terpenoids could be enriched through polyamide column chromatography.The above work will help to solve the problem of resolution and safety induced by other column chromatography,and to provide a new method for the industrialized enrichment of terpenoids.  

Key words: polyamide, ethanol-water system, terenoids, lipophilic pigment, purification