Solution thermodynamic study of several hydrocarbons in γ-butyrolactone and ethylene glycol mixtures by GLC

The gas—liquid chromatographic technique was used to determine the thermodynamic properties of solutions at infinite dilution for binary and ternary systems of five normal paraffins (C₅–-C₉), cyclohexane, benzene and toluene with γ-butyrolactone and ethylene glycol mixtures. A combination solvent of 50 mol % of γ-butyrolactone and ethylene glycol was shown to have the highest selectivity towards aromatic hydrocarbons.     

Determination of trace C6C8 aromatics in Iraqi natural gasoline by gas-liquid chromatography

The content of C₆C₈ aromatics in Iraqi natural gasoline and a benzene-free hexane fraction was determined quantitatively by gas-liquid chromatography using a 3 m column packed with 30% 1,2,3-tris(2-cyanoethoxy) propane on Diatomite S at 140 °C. The method employed gave more accurate results than standard methods for the samples used, as a result of the separation of the benzene peak after n-tridecane.