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Abstract
This communication evaluates alternate sample preparation, PAH extraction and different high performance liquid chromatography (HPLC) analytic techniques for the analysis of PAH in pitch. The HPLC response using fluorescence (Fl) and particle beam mass spectrometric detectors are compared. An analytical methodology is proposed which assures a repeatability better than 7% for the 14 PAH examined. The pitch sample is meticulously ground and the polycyclic aromatic hydrocarbons are solubilized with ultrasonic agitation in acetonitrile. The filtered extract is diluted and finally eluted in an analytical column with a fluorescence detector and optimized wavelength selection. Results will be presented comparing PAH levels for selected pitches supplied to the aluminium industry.