کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1201510 | 965031 | 2013 | 6 صفحه PDF | دانلود رایگان |
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.
► Selectivity of IL columns for alkyl phosphates compared.
► Elution order changes with temperature for homologous series.
► Thermodynamic study shown as tool for column selection.
Journal: Journal of Chromatography A - Volume 1271, Issue 1, 4 January 2013, Pages 170–175