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《Chinese Journal of Chromatography》 2006-02
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Analysis of Fatty Acids in Gymnocypris przewalskii Oil by Gas Chromatography/Mass Spectrometry with Base-Catalyzed Transesterification

BO Haibo~(1,2),WANG Xia~3,ZHAI Zongde~3,LI Yongmin~3,CHEN Liren~1(1.Lanzhou Institute of Chemical Physics,the Chinese Academy of Sciences,Lanzhou 730000,China;2.Qinghai Entry-Exit Inspection and Quarantine Bureau,Xining 810000,China;3.Graduated School,the Chinese Academy of Sciences,Beijing 100039,China)  
The composition of fatty acids(FA) in Gymnocypris przewalskii oil was identified and quantified by gas chromatography(GC)/electron impact(EI) mass spectrometry(MS).A base-catalyzed transesterification method was used to convert fatty acids to methyl esters.The lipids were extracted using(petroleum) ether and the total lipids in dried meat and skin of Gymnocypris przewalskii were about 25%.Forty-seven fatty acids were identified in the current study. Main types of fatty acids found in the oils were normal saturated,mono-branched,multi-branched,cyclopropane,furanoid,normal monounsaturated and polyunsaturated fatty acids.Saturated fatty acids were approximately 25.7% of the total,and the main components were C_(14∶0)(3.4%),C_(16∶0)(19.4%) and C_(18∶0)(1.1%).Unsaturated fatty acids were totally 73.6%,and the major components of monounsaturated fatty acids were C_(16∶1(9))(19.8%),C_(18∶1(9))(18.6%) and C_(18∶1(11))(7.3%);polyunsaturated fatty acids were mainly composed of C_(18∶2(9,12))(4.8%),C_(18∶3(9,12,15))(3.1%),C_(20∶4(5,8,11,14))(1.2%),C_(20∶5(5,8,11,14,17))(EPA,9.4%) and C_(22∶6(4,7,10,13,16,19))(DHA,6.7%).Especially,furyl-,cyclopropane-and several odd and branched chain fatty acids were found in Gymnocypris przewalskii oil.It is thus an(important) dietary(resource) of functional fatty acids.
【Fund】: 中国科学院百人计划项目
【CateGory Index】: TS207.3
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