title: Gas chromatographic retention of alkyl phosphates on ionic liquid stationary phases.
abstract: Retention behaviors of alkyl phosophates were studied on a series of ionic liquid gas chromatography columns. The selectivity of the IL columns for alkyl phosphates were compared with a 5% phenyl column as a route to evaluating the potential use of IL columns in the analysis of alkyl phosphates in petroleum samples in both one- and multi-dimensional GC. Most interestingly, we demonstrate for the first time the dependence of elution order on separation temperature for members of a homologous series of compounds. At low temperatures it was found that trihexyl phosphate eluted before trioctyl phosphate, while at higher temperatures this pattern was reversed.
authors.affiliation: Department of Chemistry, University of Alberta, Edmonton, Alberta, Canada T6C 2X4.
authors.forename: Brandon M
authors.initials: BM
authors.lastname: Weber
authors.forename: James J
authors.initials: JJ
authors.lastname: Harynuk
mesh_terms: D002849:Chromatography, Gas / Q000295:instrumentation / Q000379:methods*; D052578:Ionic Liquids / Q000737:chemistry*; D010755:Organophosphates / Q000032:analysis / Q000737:chemistry* / Q000302:isolation & purification; D010578:Petroleum; D013696:Temperature
chemical_list: D052578:Ionic Liquids; D010755:Organophosphates; D010578:Petroleum