||Application of Capillary Supercritical Fluid Chromatography to the Analysis of a Middle Distillate Fuel.
Wright, B. W. ;
Smith, R. D. ;
||Battelle Pacific Northwest Labs., Richland, WA.;Environmental Protection Agency, Research Triangle Park, NC. Air and Energy Engineering Research Lab.
Chemical analysis ;
Environmental surveys ;
Industrial wastes ;
Laboratory equipment ;
Aromatic polycyclic hydrocarbons ;
Capillary supercritical fluid chromatography
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The paper describes the application of capillary supercritical fluid chromatography (SFC) to the analysis of a middle distillate fuel. Small diameter (50 micrometer i.d.) fused silica capillary columns coated with crosslinked 50% phenyl polymethylsiloxane provided high separation efficiency and good compatibility with flame ionization detection. High resolution separations of the chemical class fractions obtained by alumina adsorption chromatography were obtained using carbon dioxide as the supercritical mobile phase and simple pressure programming techniques. In addition to the less polar fuel components, supercritical carbon dioxide allowed chromatography of the nitrogen-containing polycyclic aromatic hydrocarbon fraction and the hydroxylated polycyclic aromatic materials.