title: Flow-modulated comprehensive two-dimensional gas chromatography with simultaneous flame ionization and quadrupole mass spectrometric detection.
abstract: Flow-modulated comprehensive two-dimensional gas chromatography with simultaneous monitoring of the separation by flame ionization (GC × GC-FID) and quadrupole mass spectrometric (GC × GC-qMSD) detection was studied for the analysis of gasoline and kerosene samples. The acquisition frequency of the FID was 100 Hz and of the qMSD 18 Hz for the mass range m/z 40-300. The instrumental set-up is such that both one-dimensional (GC-FID and GC-qMSD) and two-dimensional separations using the same working conditions can be performed. Gasoline and kerosene samples were analyzed on the column combination HP-5MS ((1)D)+HP INNOWax ((2)D). Three modulated peaks were obtained for each hydrocarbon present above 0.1% with ca. 300 ms peak width at the base using 6 s modulation times. Modulated peaks in GC × GC-FID were thus characterized by ca. 30 points while those in GC × GC-qMSD method by 6-8 points only. The FID speed is sufficient for reliable quantitative analysis, while the qMSD scan speed is perfectly appropriate for identification purposes. Moreover, in the GC × GC-qMSD method considerably improved quality of uncorrected spectra was obtained, arising from the enhanced separation over one-dimensional GC-MSD analysis. Spectral match qualities of up to 98% were found.
authors: Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, STU, Bratislava, Slovakia. jan.krupcik@stuba.sk
authors: Ján
authors: J
authors: Krupčík
authors: Roman
authors: R
authors: Gorovenko
authors: Ivan
authors: I
authors: Spánik
authors: Pat
authors: P
authors: Sandra
authors: Daniel W
authors: DW
authors: Armstrong
mesh_terms: D008401:Gas Chromatography-Mass Spectrometry / Q000295:instrumentation* / Q000379:methods*; D005742:Gasoline / Q000032:analysis; D006838:Hydrocarbons / Q000737:chemistry; D007648:Kerosene / Q000032:analysis; D015203:Reproducibility of Results
chemical_list: D005742:Gasoline; D006838:Hydrocarbons; D007648:Kerosene