期刊
JOURNAL OF CHROMATOGRAPHY A
卷 1575, 期 -, 页码 72-79出版社
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2018.09.010
关键词
FAME; 3-hydroxymethyl pyridine ester; GC; El; Orbitrap; Q-Exactive; NIST; Ionic liquid
资金
- Investments for the Future of the French Government [ANR-001]
- Regional Council of Picardie
- European Union
Fatty acid methyl esters (FAMES), which are commonly used to characterize lipids, have several limitations to conclude on many structures. 3-Pyridylcarbinol esters (3-PCE) are used to characterize fatty acid structures [1], in particular, to identify ring and double bond positions on the carbon chain. Chromatographic separation of these esters is complex due to their polarity and high boiling points. In this study, we used a column with high resolutive power based on ionic liquids to increase the separation quality in gas chromatography (GC). In addition, we used a high-resolution detector (Orbitrap) to limit non-specific signals and improve the detection limits. This detector could be used with a mass filter at 5 ppm for the rapid determination of 3-PCE from its characteristic ions (m/z = 108.0441 and 92.0495). This filter allowed the identification of derivative fatty acids with good sensibility. Thus, it was possible to characterize 3-PCE by measuring the exact fragment masses to confirm structures such as C19:2n12cyclo Delta 9. (C) 2018 Elsevier B.V. All rights reserved.
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