Abstract
A laboratory-based generation and collection system for bitumen fumes is presented. The method has been evaluated with respect to sampling temperature, sampling time and the mass of bitumen used for the fume generation. Fume emissions from different bitumens were compared and the dependence on temperature was studied in the laboratory. Clean-up of the bitumens and the fume condensates was carried out using dimethylformamide liquid-liquid extraction and an h.p.l.c. back-flush technique. More than 180 polycyclic aromatic compounds (PACs) in the range of three to five benzene rings could be detected, consisting of both polynuclear aromatic hydrocarbons (PAHs) and polynuclear aromatic sulphur heterocyclics (PASHs). For both compound groups, the abundance of polymethylated derivatives was higher than that of the parent compounds.
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