Authors
Michael J Kleeman, James J Schauer, Glen R Cass
Publication date
2000/4/1
Journal
Environmental science & technology
Volume
34
Issue
7
Pages
1132-1142
Publisher
American Chemical Society
Description
A dilution source sampling system is augmented to measure the size-distributed chemical composition of fine particle emissions from motor vehicles. Measurements are made using an optical particle counter (OPC), a differential mobility analyzer (DMA)/condensation nucleus counter (CNC) combination, and a pair of microorifice uniform deposit impactors (MOUDIs). The sources tested with this system include catalyst-equipped gasoline-powered light-duty vehicles, noncatalyst gasoline-powered light-duty vehicles, and medium-duty diesel trucks. Chemical composition analysis demonstrates that particles emitted from the gasoline-powered vehicles tested are largely composed of organic compounds while particles emitted from diesel engines contain roughly equal amounts of organic compounds and elemental carbon. The particle mass distributions from all mobile sources tested have a single mode that peaks at …
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MJ Kleeman, JJ Schauer, GR Cass - Environmental science & technology, 2000