Abstract
Tetralin and naphthalene in a coal liquefaction recycle solvent were determined by high performance liquid chromatography (HPLC) with a ..mu..-Bondapak C/sub 18/ stationary phase and a methanol:water mobile phase. Initially two fractions were collected from an aluminum oxide open column. The first fraction contained tetralin and the second naphthalene. The standard addition method was employed to determine tetralin and naphthalene. The standard deviation was 0.024% for tetralin and 0.035% for naphthalene. Several aromatic and hydroaromatic compounds were identified by their chromatographic behavior and by their fluorescence excitation and emission spectra. A correlation factor which relates the log k' values for polycyclic aromatic hydrocarbons (PAH), alkyl-substituted aromatic hydrocarbons, and hydroaromatics to certain structural features was developed. The results from this work show the possibility of developing an overall separation and characterization scheme for complex mixtures of aromatic and hydroaromatic compounds.
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