PEFTEC 2017 - Abstract

Abstract Title: Virtual Gas Chromatography of Gasoline: Comparison with ASTM Chromatograms.
Abstract Type: Poster
Presenter Name: Dr Walter Spieksma
Company/Organisation: StillPeaks
Session Choice: Other

Abstract Information :

Virtual GC is a software tool to understand and optimize TPGC analysis. Hydrocarbon peaks up to C9 of any temperature programmed GC method in the Gasoline volatility range can be identified. The Detailed Hydrocarbon Analysis of gasoline is a challenge. Peak purity issues forced ASTM to have 4 different dimethylsilicone separation methods for DHA of spark-ignition fuel: methods D6729, D6730, D6733#1 and D6733#2 on a 50 or 100 m column, with different chromatograms and peak identification tables. StillPeaks VGC can pre-calculate these ASTM chromatograms using one isothermal Kovats index identification table and the input of the GC dimensions and settings. ASTM chromatograms of hydrocarbons in gasoline are compared to the VGC calculations of Giddings peak move and Golay zone dispersion. Peaks of 230 hydrocarbons on a 10 m column and a 1000 m column will be presented.

This either is one poster or a presentation taking about 20 minutes on Thursday:

  • 1 minutes company outline
  • 5 minutes demonstration of Giddings Peak move theory and Golay Hu curves,
  • 4 minutes Kovats index, retention time and peak width,
  • 5 minutes ASTM comparison of predicted and measured chromatograms
  • 5 minutes looking up the speed and resolution limits of gasoline separations.
Take-away message: Co-elutions can be predicted in fast DHA of gasoline !

StillPeaks peak identification StillPeaks creates advanced chemical applications (see Recently we finished our first products Virtual GC and Pattern DHA. VGC predicts the chromatograms of 230 hydrocarbons on poly-Phenyl-Methyl-Silicone stationary phases. Gasoline analysis can be optimized with VGC following method ASTM D6730 with a 5% Phenylmethylsilicone precolumn and a 100m Dimethylsilicone stationary phase.