Journal
JOURNAL OF CHROMATOGRAPHY A
Volume 1453, Issue -, Pages 134-137Publisher
ELSEVIER SCIENCE BV
DOI: 10.1016/j.chroma.2016.05.045
Keywords
Hydrogenation; Hydrogen carrier gas; Solid-phase microextraction fiber core; Solid-phase microextraction fiber coating; Olive oil fatty acid alkyl esters; Alkenes
Funding
- University of Camerino (Italy), (Fondo di Ateneo per la Ricerca)
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When hydrogen is used as carrier gas, carbon-carbon double bonds may be hydrogenated in the hot gas chromatograph (GC) injector if introduced by solid-phase microextraction (SPME). SPME fibers coated with polydimethylsiloxane (PDMS)/carboxen/divinylbenzene (DVB), PDMS/carboxen, polyacrylate, PDMS/DVB and PDMS on fused silica, stableflex or metal alloy core have been tested with fatty acid methyl esters (FAMEs) from olive oil. Using coatings containing DVB, hydrogenation took place with high conversion rates (82.0-92.9%) independently of the core material. With all fibers having a metal core, hydrogenation was observed to a certain extent (27.4-85.3%). PDMS, PDMS/carboxen and polyacrylate coated fibers with a fused silica or stableflex core resulted in negligible hydrogenation (0.2-2.5%). The occurrence of hydrogenation was confirmed also with other substances containing carbon-carbon double bonds (n-alkenes, alkenoic acids, mono- and polyunsaturated fatty acid methyl and ethyl esters). (C) 2016 Elsevier B.V. All rights reserved.
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