Flow-modulated comprehensive two-dimensional gas chromatography with simultaneous flame ionization and quadrupole...

Area of Science:

• Analytical Chemistry
• Chromatography
• Spectrometry

Background:

• Comprehensive two-dimensional gas chromatography (GC × GC) is a powerful separation technique.
• Simultaneous detection using flame ionization detection (FID) and quadrupole mass spectrometry (qMSD) enhances analytical capabilities.

Purpose of the Study:

• To investigate the application of flow-modulated GC × GC with simultaneous FID and qMSD detection for analyzing gasoline and kerosene.
• To evaluate the performance of this method for both quantitative and qualitative analysis.

Main Methods:

• Utilized flow-modulated GC × GC with FID (100 Hz acquisition) and qMSD (18 Hz acquisition, m/z 40-300) detection.
• Employed a column combination of HP-5MS (¹D) and HP INNOWax (²D).
• Analyzed gasoline and kerosene samples under identical one-dimensional and two-dimensional separation conditions.

Main Results:

• Achieved reliable quantitative analysis with GC × GC-FID (ca. 30 points per modulated peak).
• Obtained identification-suitable data with GC × GC-qMSD (6-8 points per modulated peak).
• Demonstrated significantly improved spectral quality in GC × GC-qMSD compared to 1D GC-MSD, with spectral match qualities up to 98%.

Conclusions:

• Flow-modulated GC × GC-FID provides sufficient speed for accurate quantification of hydrocarbons.
• GC × GC-qMSD offers enhanced separation for improved spectral quality and reliable identification.
• The combined GC × GC-FID and GC × GC-qMSD approach is effective for comprehensive analysis of complex hydrocarbon mixtures like gasoline and kerosene.