Rapid Determination of Ethyl Laurate from Supercritical Ethanol鈥揅arbon Dioxide Transesterification by Full Evaporation Headspace Gas Chromatography

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• 作者：Qingqing Guan ; Minli Wang ; Hua Shang ; Chunyun Zhang ; Chaohai Wei ; Ping Ning ; Junjie Gu ; Xin-Sheng Chai
• 刊名：Energy & Fuels
• 出版年：2014
• 出版时间：November 20, 2014
• 年：2014
• 卷：28
• 期：11
• 页码：6995-6998
• 全文大小：247K
• ISSN：1520-5029

文摘

This paper reports on a full evaporation headspace gas chromatography (FE HS-GC) technique for rapid determination of the ethyl laurate content in supercritical ethanol鈥揷arbon dioxide mixtures. The data show that, at an equilibration temperature of 150 掳C, with a small volume (up to 75 渭L) of sample, the full evaporation of ethyl laurate can be achieved in 3 min. The method had a relative standard deviation of less than 5.5% in replicate measurements; the limit of quantification (LOQ) was 26.0 渭g; and the recovery ranged from 96 to 105%. The method is simple and rapid. It is quite suitable for use in the determination of ethyl laurate or similar compounds in an ethanol鈥揷arbon-dioxide-based supercritical reaction system.