Quinone emissions from gasoline and diesel motor vehicles

Quinone emissions from gasoline and diesel motor vehicles

TitleQuinone emissions from gasoline and diesel motor vehicles
Publication TypeJournal Article
Year of Publication2007
AuthorsChris A Jakober, Sarah G Riddle, Michael A Robert, Hugo Destaillats, M. Judith Charles, Peter G Green, Michael J Kleeman
JournalEnvironmental Science and Technology
Volume41
Chapter
Pagination4548-4554
Abstract

Gas- and particle-phase emissions from gasoline and diesel vehicles operated on chassis dynamometers were collected using annular denuders, quartz filters, and PUF substrates. Quinone species were measured using -(2,3,4,5,6-pentafluorobenzyl)hydroxylamine derivatization in conjunction with gas chromatography-mass spectrometry and highperformance liquid chromatography-mass spectrometry. Nine quinones were observed, ranging from C6 to C16. Newspecies identified in motor vehicle exhaust include methyl-1,4-benzoquinone, 2-methyl-1,4-naphthoquinone (MNQN), and aceanthrenequinone. Gas-phase motor vehicle emissions of quinones are also reported for the first time. Six gasphasequinones were quantified with emission rates of 2-28 000 µg L-1 fuel consumed. The most abundant gas-phase quinones were 1,4-benzoquinone (BQN) andMNQN. The gas-phase fraction was ≥69% of quinone mass for light-duty gasoline emissions, and ≥84% for heavy duty diesel emissions. Eight particle-phase quinoneswere observed between 2 and 1600 µg L-1, with BQN the most abundant species followed by 9,10-phenanthrenequinone and 1,2-naphthoquinone. Current particle-phase quinone measurements agree well with the few available previous results. Further research is needed concerning the gas-particle partitioning behavior of quinones in ambient and combustion source conditions.