GC Determination of Terpene Lactones in Gingko Leaf Extracts with Capillary Chromatographic Column

Chromatographic conditions for separation of terpenes (named in abbreviation as GA,GB,GC,GJ and BB) from extracts of gingko leaves with capillary column were studied,and the terpenes were satisfactorily separated.Squalane was used as internal standard in the determination.The relative mass correction factors were calculated theoratically and also determined experimentally.Tests for recovery of BB,GA,GB and GC were made by addition of standards to a sample of known terpene contents and analyzed by the proposed method,values of recovery obtained were 95.2%,95.5%,94.6% and 96.1% respectively.