152
M. Talebi et al.
observed [23]. Anthracene eluted before phenanthrene on this IL column, while the
reverse elution order was observed on all other commercial GC stationary phases.
6.6 Characterization of Petroleum Samples
Ionic liquid columns have been effectively utilized for gas chromatographic analysis
of complex petroleum samples. The comparatively high thermal stability of IL-based
columns allows convenient elution of the heavy aromatic compounds in low-boiling
petrochemical samples. The very polar SLB-IL100 and SLB-IL111 columns were
successfully used for one-dimensional and comprehensive two-dimensional flowmodulated GC analysis of aromatic hydrocarbons in gasoline, reformate, and fluid
catalytic cracking samples [124]. The effective selectivity of these polar columns
produced excellent fractionation of hydrocarbons from aromatic compounds in lowboiling petroleum products. The combination of a SLB-IL111 column in the first
dimension and a 5% phenyl polydimethylsiloxane monolithic silica (PDMS) column
in the second dimension offered the best results for the individual determination of
C6–C11 aromatic hydrocarbons. As illustrated in Fig. 6.6, the C8–C11 aromatic
compounds, indene, and the methyl-indenes, as well as naphthalene and methylnaphthalenes, are group-separated employing the SLB-IL111 (
1 D) + HP-5MS (
2 D)
column series.
Fig. 6.6 Plot of flow-modulated GC × GC-FID analysis of gasoline sample on the SLB-IL 111
(1D) + HP-5MS (2D) column series. Reprinted with permission from Ref. [124]
M. Talebi et al.
observed [23]. Anthracene eluted before phenanthrene on this IL column, while the
reverse elution order was observed on all other commercial GC stationary phases.
6.6 Characterization of Petroleum Samples
Ionic liquid columns have been effectively utilized for gas chromatographic analysis
of complex petroleum samples. The comparatively high thermal stability of IL-based
columns allows convenient elution of the heavy aromatic compounds in low-boiling
petrochemical samples. The very polar SLB-IL100 and SLB-IL111 columns were
successfully used for one-dimensional and comprehensive two-dimensional flowmodulated GC analysis of aromatic hydrocarbons in gasoline, reformate, and fluid
catalytic cracking samples [124]. The effective selectivity of these polar columns
produced excellent fractionation of hydrocarbons from aromatic compounds in lowboiling petroleum products. The combination of a SLB-IL111 column in the first
dimension and a 5% phenyl polydimethylsiloxane monolithic silica (PDMS) column
in the second dimension offered the best results for the individual determination of
C6–C11 aromatic hydrocarbons. As illustrated in Fig. 6.6, the C8–C11 aromatic
compounds, indene, and the methyl-indenes, as well as naphthalene and methylnaphthalenes, are group-separated employing the SLB-IL111 (
1 D) + HP-5MS (
2 D)
column series.
Fig. 6.6 Plot of flow-modulated GC × GC-FID analysis of gasoline sample on the SLB-IL 111
(1D) + HP-5MS (2D) column series. Reprinted with permission from Ref. [124]