Retention behaviour of alkylated and non-alkylated polycyclic aromatic hydrocarbons on different types of stationary phases in gas chromatography

Ewa Skoczyńska*, Jacob de Boer

*Corresponding author for this work

Research output: Contribution to JournalArticleAcademicpeer-review

Abstract

The gas chromatographic retention behaviour of 16 polycyclic aromatic hydrocarbons (PAHs) and alkylated PAHs on a new ionic liquid stationary phase, 1,12-di(tripropylphosphonium) dodecane bis(trifluoromethanesulfonyl)imide (SLB®-ILPAH) intended for the separation of PAH mixtures, was compared with the elution pattern on more traditional stationary phases: a non-polar phenyl arylene (DB-5ms) and a semi-polar 50% phenyl dimethyl siloxane (SLB PAHms) column. All columns were tested by injections of working solutions containing 20 parental PAHs from molecular weight of 128 to 278 g/mol and 48 alkylated PAHs from molecular weight of 142 to 280 g/mol on a one dimensional gas chromatography-mass spectrometry (GC-MS) system. The SLB PAHms column allowed separation of most isomers. The SLB®-ILPAH column showed a rather different retention pattern compared to the other two columns and, therefore, provided a potential for use in comprehensive two-dimensional GC (GC×GC). The ionic liquid column and the 50% phenyl column showed good thermal stability with a low bleed profile, even lower than that of the phenyl arylene “low bleed” column.

Original languageEnglish
Article number7
Pages (from-to)1-12
Number of pages12
JournalSeparations
Volume6
Issue number1
Early online date29 Jan 2019
DOIs
Publication statusPublished - 1 Mar 2019

Keywords

  • Alkylated polycyclic aromatic hydrocarbons (alkylated PAHs)
  • Chromatographic selectivity
  • Gas chromatography
  • Ionic liquid stationary phase

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