卤虾油有效成分的GC_MS分析
卤虾油有效成分的GC-MS分析
韩振为,周 冉
(天津大学化工学院 精馏技术国家工程研究中心,天津 300072)
摘 要:采用GC-MS方法对经分子蒸馏后两个馏分中的卤虾油有效成分进行了分析。从脱臭馏分(馏分Ⅰ)中分离鉴定出18个成分,其中丁内酯、7-亚丙基二环庚烷、二甲基癸烷、十一酸、油酸为主要成分,相对含量分别为31.65%、15.20%、8.76%、3.36%、4.78%;馏分Ⅱ中分离鉴定出15个脂肪酸成分,含量约为71.60%,相对含量为85.11%。其中棕榈酸、油酸、EPA、亚麻酸为主要成分,相对含量分别为26.86%、35.35%、3.45%和3.03%,多不饱和脂肪酸含量约为40.34%,相对含量高达47.95%。结果表明,经分子蒸馏后的馏分中,脂肪酸得到了有效富集,GC-MS分析中杂质碎片峰干扰小,总含量高达84.12%。
关键词:GC-MS 分子蒸馏;卤虾油;不饱和脂肪酸
Analysis of Effective Constituents in Artemia Oil by GC-MS
HAN Zhen-wei,ZHOU Ran
(School of Engineering and Technology,Tianjin University,National Engineering Research Center for
Distillation Technology, Tianjin 300072, China)
Abstract :The nutritional ingredients of Artemia were studied. The effective constituents of Artemia oil in two distillates,separated by molecular distillation, were analyzed by gas chromatography-mass spectrometry. 18 compounds in off-odorfraction(distillateⅠ)were identified, and their relative contents were determined. The major constituents are found to bebutyrolactone, 7-propylidene, decane- 2, 9-dimethyl-, undecanoic acid, and oleic acid with the relative contents of 31.65%,15.20%, 8.76%, 3.36% and 4.78% respectivelye. 15 compounds in distillateⅡ were identified with the content about 71.60%,and the relative content is 85.11%. The major constituents are found to be palmitic acid, oleic acid, eicosapentaenoic acid, andlinolenic acid with the relative contents of 26.86%, 35.35%, 3.45%, 3.03% respectively, and the polyunsaturated fatty acidshave the content of 40.34%with the relative content of 47.95%. It was indicated that the fatty acids are concentrated efficientlywith the total content of 84.21% by molecular distillation, meanwhile the fragment peek of impurities have fewer interference byassayed GC-MS.
Key words:GC-MS;molecular distillation;artemia oil;unsaturated fatty acid
中图分类号:TS201.21 文献标识码:A 文章编号:1002-6630(2006)09-0211-04
卤虾油中含有人类必须的8种氨基酸和各种重要的脂肪酸[1,2],这些重要的脂肪酸,如棕榈酸、油酸、硬脂酸、亚油酸、α-亚麻酸、二十碳五烯酸(EPA),已被证实具有重要的生理作用。亚油酸是n-6PUFAs家族中已知的有益代表之一,这种脂肪酸在体内的缺乏与冠心病危险增加有关。α-亚麻酸及其代谢产物是温血动物大脑皮质、视网膜、睾丸和精子中乙醇胺磷脂和神经磷脂的重要组成部分[3]。EPA 具有调血脂,抗血小板聚集,延缓血栓形成,保护脑血管以及抗癌等多种作用[4]。
卤虾油中的脂肪酸含量可以采用一般的脂肪酸分析
方法进行分析。目前常用的脂肪酸分析方法主要有铜试剂法[5]、银化薄层色谱法[6]、GC法[7]、HPLC 法[8~10]等。前两种方法虽然简单,但步骤繁琐,且准确性差。HPLC 法对于分离高沸点的脂肪酸有一定的优势,但由于卤虾油所含成分复杂,分析时需要有标准物质对照,分析成本很高,而且信号的检测困难,例如采用柱前衍生反相HPLC法中反相的UVD检测器很易受脂肪酸饱和和溶剂的影响。
随着色质联用技术的发展,特别是气相色谱质谱联用(GC-MS)技术的发展较快,目前国内已有将GC-MS 用
收稿日期:2005-09-20


