Aromatic Compounds in Petroleum Products

Abstract

A rapid chromatographic method for the determination of aromatic compounds in hydrocarbon mixtures in the gasoline and kerosene range utilizes a combination of silica gel separation and ultraviolet-stimulated fluorescence. The method is reproducible to within ±2% and requires a maximum of 45 minutes per determination.Olefins and other hydrocarbons do not interfere.

Hydrocarbons

“…The use of spectral methods is very common, usually in combination with separation methods, as, for example, column chromatography or countercurrent distribution, or else column chromatography on silica gel combined with the use of fluorescing dyes (20)(21)(22)(23)(24)(25)(26)(27)(28) or gas chromatography.…”

Rapid Determination of Aromatics in Petroleum Fractions

“…different methods have been reported for the quantitative determination of aromatics in petroleum fractions. They are most varied and include such techniques as sulfonation {18), nitration (10), hydrogenation (19), oxidation (9), solubility (11), absorption (6), aniline points (9), silica gel adsorption (17), chromatography (7), refractive index and specific dispersion (21), ultraviolet spectrometry (4), and Raman spectrometry (13). Several of these methods involve the use of more than one technique.…”

Determination of Aromatics and Olefins in Wide Boiling Petroleum Fractions

“…Conrad has developed a rapid method for the determination of aromatic compounds in fuels of the gasoline and kerosene range, based on chromatography and ultraviolet stimulated fluorescence (6). Limited experience has shown this method to be less reliable as the complexity of the aromatics and the olefinic content increases, as is the case with AN-F-58a fuels.…”