Abstract
Vehicular exhausts: identification of further carcinogens of the polycyclic aromatic hydrocarbon class.
Highlights
Fractions isolated from petrol engine and diesel engine exhaust samples were assayed for the presence of polycyclic aromatic hydrocarbons
The methods employed were repetitive adsorption chromatography on alumina and silica gel, followed by ultra-violet absorption and spectrographic analysis of the eluates. By these methods the following compounds were identified in the petrol engine exhaust sample: 3,4-benzofiuoranthene, tetracene, pentaphene, 1,2,3,4-dibenzopyrene, 11, 12-benzofiuoranthene, 1,2,9,10-dibenzotetracene, 1,2,4,5-dibenzopyrene, and 1,12,2,3-dibenzoperylene
Chemistry Department, University of Glasgow, for the gift of samples of polycyclic aromatic hydrocarbons
Summary
The 1,2,4,5-dibenzopyrene eluates from petrol soot had a blue fluorescence. The absorption spectrum, in benzene (Fig. 4), gave peaks at 428, 416, 395, 378, 360, 327, 306, and 296 m,t., while fluorescence maxima at 416, and 440 m/#. The absorption spectrum (Fig. 5) using benzene as solvent, showed maxima at. Absorption maxima, in benzene, for the latter still unidentified compound, following chromatographic separation from the dibenzoperylene were obtained at 422, 396, 369, 347, 328 and 304 m,. 6.-Fluorescence spectra of compounds derived from petrol exhaust soot: (excitation at 365 mp). The 1,2,4,5dibenzopyrene occurred in the petrol soot at a concentration of about 10 parts per million
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