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首页> 外文期刊>Journal of liquid chromatography and related technologies >Silver ion high performance liquid chromatography of polynuclear aromatic derivatives of positionally isomeric octadecenoic fatty acids
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Silver ion high performance liquid chromatography of polynuclear aromatic derivatives of positionally isomeric octadecenoic fatty acids

机译：位置异构十八碳烯酸多核芳族衍生物的银离子高效液相色谱

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摘要

The chromatographic properties of positionally isomeric octadecenoic fatty acids in silver ion high performance liquid chromatography with hexane-based and dichloromethane-based mobile phases were studied after converison in 2-naphthacyl, 2-naphthylmethyl and 9-anthrylmethyl derivatives. The retention decreased in the order 2-naphthacyl, 9-anthrylmethyl, 2-naphthylmethyl derivatives. Dichloromethane-acetonitrile mobile phases provided better resolutoin and 2-naphthacyl and 9-anthrylmethyl derivatives of 6-, 9-, and 11-18:1 were fully resolved with dichloromethane-acetonitrile 100:1.125 (v/v). The behavior of the aromatic derivatives, examined so far by Ag-HPLC, under comparably experimental conditions, was compared and a clear tendency of improving the resolution was observed when the number of aromatic nuclei in the aromatic fragment increased.The effect was ascribed to the increased electron-donating effect of the aromatic rings in the ester moiety, which supposedly enhanced the formatoin of a three center cmplex between double bond, a carbonyl oxygen, and silver ion. THe good resolution of 9-anthrylmethyl derivatives is of potential practical value since it allows for the determiantion of nanogram amounts of fatty acids by silver ion HPLC with fluorescent detection.
机译：在2-萘酰基，2-萘甲基和9-蒽甲基衍生物聚合后，研究了具有己烷基和二氯甲烷基流动相的银离子高效液相色谱中位置异构的十八烯脂肪酸的色谱特性。保留率以2-萘酰基，9-蒽甲基，2-萘甲基甲基衍生物的顺序降低。二氯甲烷-乙腈流动相可提供更好的分辨能力，并且二氯甲烷-乙腈100：1.125（v / v）可以完全溶解6-，9-和11-18：1的2-萘酰基和9-蒽甲基。比较了迄今为止用Ag-HPLC在相同的实验条件下观察到的芳族衍生物的行为，当芳族片段中的芳核数目增加时，观察到明显的提高分离度的趋势。增强了酯部分中芳环的供电子作用，据推测这增强了双键，羰基氧和银离子之间的三个中心复合物的甲酸酯。 9蒽甲基衍生物的良好分离度具有潜在的实用价值，因为它允许通过带有荧光检测的银离子HPLC测定纳克级的脂肪酸。

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