Chemical Analysis of Jet Fuel Polar, Heteroatomic Species via High-Performance Liquid Chromatography with Electrospray Ionization鈥揗ass Spectrometric Detection

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• 作者：Ryan K. Adams ; Steven Zabarnick ; Zachary J. West ; Richard C. Striebich ; David W. Johnson
• 刊名：Energy & Fuels
• 出版年：2013
• 出版时间：May 16, 2013
• 年：2013
• 卷：27
• 期：5
• 页码：2390-2398
• 全文大小：331K
• 年卷期：v.27,no.5(May 16, 2013)
• ISSN：1520-5029

文摘

High-performance liquid chromatography (HPLC) with electrospray ionization鈥搈ass spectrometry (ESI鈥揗S) was used to identify several classes of heteroatomic, polar compounds containing oxygen, nitrogen, and sulfur in a variety of jet fuel samples. While nitrogen, oxygen, and sulfur compounds are present only at low concentrations in jet fuel, they contribute significantly to some important fuel properties. These trace, heteroatomic species can provide positive (e.g., improved lubricity) or negative (e.g., reduced thermal stability) impacts. Reversed-phase liquid chromatography with ESI鈥揗S detection allows for the polar components to be selectively ionized and subsequently identified, despite the complex hydrocarbon fuel matrix. Phenols and carbazoles are detected in negative-ion [M 鈥?H]^{鈭?/sup> mode, while anilines, pyridines, indoles, and quinolines are observed in positive-ion [M + H]+ mode. Accurate mass measurements allow for the molecular formula of the polar components to be determined, while different structural classes of isomeric compounds could be determined via HPLC separation and the formation of derivatives. Derivatization shifts the retention time, species masses, and potentially, the ion charge formed of specific compound classes, allowing them to be positively identified. The usefulness and limits of HPLC with ESI鈥揗S for quantitation of these fuel polar, heteroatomic species are also explored.}