Hyphenation of supercritical fluid chromatography and two-dimensional gas chromatography-mass spectrometry for group type separations

dc.contributor.authorPotgieter, H.
dc.contributor.authorVan der Westhuizen, R.
dc.contributor.authorRohwer, Egmont Richard
dc.contributor.authorMalan, D.
dc.date.accessioned2013-09-19T14:13:14Z
dc.date.available2013-09-19T14:13:14Z
dc.date.issued2013-06
dc.description.abstractThe Fischer–Tropsch (FT) process produces a variety of compounds over a wide carbon number range and the synthetic crude oil produced by this process is rich in highly valuable olefins and oxygenates, which crude oil only contains at trace levels. The characterization of these products is very challenging even when using comprehensive two-dimensional gas chromatography coupled to time-of-flight mass spectrometry (GC × GC–TOF-MS). The separation between cyclic paraffins and olefins is especially difficult since they elute in similar positions on the GC × GC chromatogram and since they have identical molecular masses with indistinguishable fragmentation patterns. Previously, a high performance liquid chromatography (HPLC) fractionation procedure was used prior to GC × GC–TOF-MS analysis to distinguish between alkenes and alkanes, both cyclic and non-cyclic, however, there was co-elution of the solvents used in the HPLC fractionation procedure, and the volatile components in the gasoline sample and the dilution introduced by the off-line fractionation procedure made it very difficult to investigate components present at very low concentrations. The hyphenation of supercritical fluid chromatography (SFC) to GC × GC is less complicated and the removal of the supercritical CO2 can be easily achieved without any loss of the volatile sample components, eliminating the introduction of co-eluting solvents as well as the dilution effect. This paper describes the on-line hyphenation of SFC to a GC × GC system in order to comprehensively characterize the chemical groups (saturates, unsaturates, oxygenates and aromatics) in an FT sample.en
dc.description.librarianhb2013en
dc.description.librarianai2014
dc.description.urihttp://www.elsevier.com/locate/chromaen
dc.identifier.citationPotgieter, H, Van der Westhuizen, R, Rohwer, E & Malan D 2013, 'Hyphenation of supercritical fluid chromatography and two-dimensional gas chromatography-mass spectrometry for group type separations', Journal of Chromatography A, vol. 1294, no. 6, pp. 137-144.en
dc.identifier.issn0021-9673 (print)
dc.identifier.issn1873-3778 (online)
dc.identifier.other10.1016/j.chroma.2013.04.020
dc.identifier.urihttp://hdl.handle.net/2263/31759
dc.language.isoenen
dc.publisherElsevieren
dc.rights© 2013 Elsevier B.V. All rights reserved. Notice : this is the author’s version of a work that was accepted for publication in Journal of Chromatography A.Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Journal of Chromatography A, vol.1294, no. 6, 2013. doi.: 10.1016/j.chroma.2013.04.020en
dc.subjectSupercritical fluid chromatographyen
dc.subjectChromatographyen
dc.subjectHyphenationen
dc.subjectLight oilen
dc.subject.lcshFischer-Tropsch processen
dc.subject.lcshChromatographic analysisen
dc.subject.lcshSynthetic fuelsen
dc.subject.lcshMass spectrometryen
dc.titleHyphenation of supercritical fluid chromatography and two-dimensional gas chromatography-mass spectrometry for group type separationsen
dc.typePostprint Articleen

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