Abstract
A supercritical fluid Chromatographic method capable of determining aromatics according to the number of rings has proved promising in distillate property-combustion correlation predictions. An initial interlaboratory study of this method was conducted for adoption as a Canadian standard petroleum test method. Six laboratories analysed 17 samples by supercritical fluid chromatography, gas chromatography-mass spectrometry and nuclear magnetic resonance spectrometry. Concentrations of total aromatics, monoaromatics and diaromatics in selected petroleum distillate fuels showed a good correlation among the methods, except for polyaromatics, which however form only a minor portion of the distillate fuels concerned. The supercritical fluid chromatographic method possesses advantages over the other methods, including moderate equipment cost, simple and low-cost operating procedure, speed and applicability to high-boiling oils.
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