摘要:
本文对中国东海东部冲绳海槽海底沉积物中一元脂肪酸的组成及其分子结构,用色谱一质谱法进行了鉴定,正构脂肪酸的碳数分布为nC_(12:0)—nC_(30:0),异构脂肪酸的碳数分布为iC_(13:0),iC_(14:0),iC_(15:0),aiC_(15:0),isopr C_(17:0),10-MeC_(16:0),iC_(17:0),aiC_(17:0),iC_(18:0),iC_(19:0)等,不饱和脂肪酸有C_(16:1△9),C_(17:1△9),C_(18:1△11),C_(19:1△11)等。并对正构异构不饱和一元脂肪酸的质谱特征进行了讨论。
Abstract:
Fatty acids were extracted from marine sediments of OKINAWA Troughin the eastern part of the East China sea. The complete fatty acid mixtureswere derivatised as methyl esters (FAME) using COCL-CH_3OH solution, theseFAME mixtures were isolated with thin layer chromatography (TLC) to getmono-fatty acids which were identified by GG-MS-DS usiug a flnnigan 4515equipped with a fused silica capillary column, fragment ious m/e 55, 69, 83,M-32, M-74 and M~+ were used as indicators for unsaturated fatty acid methylesters, fragment ion m/e 74, 87, 143, M~+ and relative retention time of GCwere used for the determination of saturated normal, iso, anteiso, 10-Methylisoprenoid fatty acid methyl ester. The results show that straight chainFAME were distributed with a series of C_(12): o to C_(30): o and branched chainwere ranged from i-C_(13): o to i-C_(19): o, ai-C_(15):o to ai-C_(17): o as well as isopr-C_(17): o and 10-MeC_(16): o and unsaturated FAME were recognized as C_(16): o toG_(19): o.
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