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首页> 外文期刊>Journal of Oleo Science >Gas Chromatographic Separation of Docosenoic Acid Positional Isomers on an SLB-IL100 Ionic Liquid Column
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Gas Chromatographic Separation of Docosenoic Acid Positional Isomers on an SLB-IL100 Ionic Liquid Column

机译:SLB-IL100离子液体色谱柱上二十二烯酸位置异构体的气相色谱分离

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摘要

Gas chromatography (GC) of docosenoic acid (22:1) has been performed for the separation of positional isomers on the novel SLB-IL100 column with a highly polar ionic liquid stationary phase. A test mixture of 22:1 methyl esters prepared from total lipids of flounder was subjected to GC on a 60 m × 0.32 mm i.d. column at an isothermal temperature of 150℃-180℃. On this column, all five positional isomers separated in the elution order of 22:1n-15, 22:1n-13, 22:1n-11, 22:1n-9, and 22:1n-7. The positional isomers, 22:1n-15, 22:1n-13, and 22:1n-11, unresolvable on conventional polar polymer phase columns, were almost completely separated from each other within 24 min at 170℃. The equivalent chain length values of 22:1n-11 to 22:1n-7 were parallel to those on polyethylene glycol and cyanopropyl polysiloxane columns, whereas 22:1n-15 and 22:1n-13 were relatively lower and closer to saturated 22:0 acid. Similar findings were also obtained for co-injected 20:1n-15 to 20:1n-11 isomers. Analysis of fish 22:1 revealed that 22:1n-13 is not always a minor isomer, as previously reported for several samples. The results of this study confirm the view that SLB-IL100 is a powerful tool for GC analysis of monounsaturated fatty acids.
机译:已经进行了二十二碳烯酸(22:1)的气相色谱(GC)分离,以在新型SLB-IL100色谱柱上分离具有高极性离子液体固定相的位置异构体。由比目鱼总脂制备的22:1甲酯的测试混合物在60 m×0.32 mm i.d.的条件下进行GC。柱在150℃-180℃的等温温度下进行。在该色谱柱上,所有五个位置异构体均按22:1n-15、22:1n-13、22:1n-11、22:1n-9和22:1n-7的洗脱顺序分离。在常规极性聚合物相色谱柱上不可分辨的位置异构体22:1n-15、22:1n-13和22:1n-11在170℃下几乎在24分钟内彼此完全分离。 22:1n-11至22:1n-7的当量链长值与聚乙二醇和氰丙基聚硅氧烷色谱柱上的当量链长值平行,而22:1n-15和22:1n-13的当量链长相对较低,更接近饱和22:1n 0酸。对于共注射的20:1n-15至20:1n-11异构体,也获得了类似的发现。对鱼类22:1的分析表明,正如先前针对多个样品所报道的,22:1n-13并不总是次要的异构体。这项研究的结果证实了以下观点:SLB-IL100是用于单不饱和脂肪酸的气相色谱分析的强大工具。

著录项

  • 来源
    《Journal of Oleo Science》 |2012年第8期|p.421-426|共6页
  • 作者

    Kana Shimizu; Yasuhiro Ando;

  • 作者单位

    Division of Marine Life Sciences, Faculty of Fisheries Science, Hokkaido University (3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, JAPAN);

    Division of Marine Life Sciences, Faculty of Fisheries Science, Hokkaido University (3-1-1 Minato-cho, Hakodate, Hokkaido 041-8611, JAPAN);

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    gas chromatography; docosenoic acid; SLB-IL100; ionic liquid; fish oil;

    机译:气相色谱法;二十二烯酸SLB-IL100;离子液体鱼油;

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