GC/MS and MS/MS studies of diesel exhaust mutagenicity and emissions from chemically-defined fuels

Chemical characterization of particulate emissions from diesel engines: A review

“…Species identification can become difficult because of the many complex structures present in diesel PM. Instruments, such as the triple-quadrupole mass spectrometer, provide MS/MS capability to assist identifying compounds of similar molecular weight, for example as used by Henderson et al (1983Henderson et al ( , 1984 and Bechtold et al (1984) to investigate the possible role of nitroaromatic compounds and PAHs in diesel soot mutagenicity. It may also be difficult to identify some species of interest because they are present only in trace amounts.…”

“…Much of the early interest in diesel PM composition was motivated by health effects concerns and aimed at the identification of PAH and nitro-PAH exhaust components Henderson et al, 1983Henderson et al, , 1984. Besides examining the potential for mutagenic effects from diesel PM extracts, the possibility was noted of nitro-and oxy-PAH formation by oxidation of material collected by filters (Lies, Hartung, Postulka, Gring, & Schulze, 1986;Risby & Lestz, 1983).…”

Destruction of naphthalene via ozone-catalytic oxidation process over Pt/Al2O3 catalyst

“…The atmospheric PAHs are mainly emitted from the incomplete combustion of organic matters, including petroleum, coal and other carbonaceous materials (e.g., wood, tobacco and food products) [1][2][3]. Traffic and coalrelated sources have been considered to be the most important PAH sources in many modern metropolitan areas [4][5][6].…”

Direct-Acting Mutagenicity of Diesel Participate Extract Is Unchanged by Addition of Neat Aromatic Compounds to Diesel Fuel

“…5 In one study, substantial concentrations of PAH were added to diesel fuel and the direct-acting Ames assay mutagenicity of the engine emissions were measured. 6 The direct-acting mutagenicity did not increase with increasing concentrations of PAH. In summary, these three studies suggest that increasing the concentrations of large aromatic compounds (>Cu) in diesel fuel has no effect on the PAH concentration in emissions from these fuels.…”