Automated Multidimensional Gas Chromatographic PNA Analysis of Hydrocarbon-Type Samples, Optimization with Respect to Speed of Analysis

Column switching–back flushing technique for the analysis of aromatic compounds in gasoline

“…The technique of matics) column for the separation and analysis of multidimensional gas chromatography [9,10] and column switching strategies [11][12][13] is effective for the analysis of a group of specific analytes in a complex matrix, and has been applied to analyze the components of interest in oil products. Among these traps were employed for the group separation and the detailed analysis of components in each group [14,15].…”

“…Results and discussion tailing. Because all the peaks from both columns were detected on the same detector under the same The column switching technique has been previconditions, normalization method with correcting ously applied to the analysis of the complex petrofactors could be employed for quantitative analysis, chemical samples [10][11][12][13][14][15]. A very polar precolumn which simplified the routine analysis of benzene and and a nonpolar analytical column is generally used in other aromatic compounds in gasoline.…”

Hydrocarbon type determination of naphthas and catalytically reformed products by automated multidimensional gas chromatography

“…T o obtain the desired PNA information by GC, two distinct and separate approaches have been implemented: singlecapillary-column analysis in which the goal is to obtain essentially complete resolution and identification of all individual components present in the sample (91, and multicolumn (multidimensional GC) analysis in which the objective is to obtain the types of separation and to separate each type according to carbon number (10- 18). For light end hydrocarbon fractions where sample complexity is manageable, the direct approach is favored; however, with increasing carbon number, the number of possible isomers to be resolved increases dramatically.…”

“…fused silica capillary column coated with methylsilicone, l.O-Mm film thickness. The peak identification is (1) isopentane, cyclopentane,(18) trans-3-dimethylcyclopentane,(19) 3-ethylpentane, (20) trans-l,2-dimethylcyclopentane, (21) 2,2,44rimethylpentane, (22) methylcyclohexane + cis-l,2-dimethylcyclopentane, (23) 2,2-dimethylhexane, (24) 1.1,3-trimethylcyclopentane, (25) ethylcyclopentane, (26) 2,5dimethylhexane, (27) 2,2,3-trimethylpentane + 2,4dimethylhexane, (28) trans -1 ,cis -2,4-trimethylcyclopentane, (29) 3,3-dimethylhexane, (30) trans -1 ,cis-2,3-trimethylcyclopentane, (3 1) 2,3,4trimethylpentane, (32) 2,3,3-trimethylpentane, (33) 2,3dimethylhexane, (34) 2-methyL34hylpentane + lI1,2-trimethylcyclopentane, (35) 2-methylheptane, (36) 4-methylheptane, (37) 3-methyC3-ethylpentane, (38) 3,4-dimethylhexane, (39) cis-1 ,frans-2,4-trimethylcyclopentane + cis-1 ,cis-2,4-trimethylcyclopentane + 3-methylheptane, (40) 3-ethylhexane, (41) cis-l,3dimethylcyclohexane + cis-1 ,trans-2.3-trimethylcyclopentane, (42) trans-l,4-dimethylcyclohexane, (43) 1, ldimethylcyclohexane, (44) 1-methyl-trans -3ethylcyclopentane, (45) 1-methyl-cis -3-ethylcyclopentane, (46) l-methyl-trans-2-ethylcyclopentane, (47) 1-methyl-1-ethylcyclopentane, (48) trans-l,2-dimethylcyclohexane, (49) cis -1 ,cis-2,3-trimethylcyclopentane, (50) frans-l,3dimethylcyclohexane + cis-1,4-dimethyIcyclohexane, (5 1) isopropylcyclopentane, (52) 1-methyl-cis-2ethylcyclopentane + 2,4dimethylheptane, (53) cis-l,2dimethylcyclohexane, (54) n-propylcyclopentane, (55) ethylcyclohexane. ANALYTICAL CHEMISTRY, VOL.…”