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Extraction of Herpetospermum Pedunculosum(Ser.) Baill. Seed Oil with Supercritical Carbon Dioxide and Analysis of the Fatty Acids Using GC/MS

WANG Hong-lun~(1,2),ZHOU Chang-fan~1,SUO You-rui~1(1.Northwest Plateau Institute of Biology,Chinese Academy of Sciences,Xining 810001,China;2.Graduate School of the Chinese Academy of Sciences,Beijing 100049,China)  
Seed oil of Herpetospermum pedunculosum(Ser.) Baill.was obtained by supercritical carbon oxide extraction.The conditions of exeract were,under pressure of 20 MPa,temperature 45 ℃,the CO_2 flow rate 35~40 kg/h and dynamic extraction time of 120 min,the method was most selective for the extraction the seed oil(yield 33.35%).And the fatty acids in the extracted oil were analysed using GC/MS.The results showed that the oil contained abundant unsaturated fatty acids.!The contents of linolenic acid,linoleic acid and oleic acid were 12.271%,20.149% and 52.282% respectively.This result provide the fundamental data for the further development of Herpetospermum pedunculosum(Ser.) Baill.seed.
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