title: Relationship between concentration of pyrene and aerosol size distribution in traffic exhausts in Taipei, Taiwan.
abstract: Variations in pyrene concentrations in motor-vehicle emissions were assessed on the basis of aerodynamic particle size and by the type of vehicle (i.e., car, truck, or bus) that passed through a Taipei, Taiwan, highway toll station. Airborne particles were collected with 8-stage cascade samplers equipped with 34-mm polyvinyl chloride filters and located in the breathing zones of toll-station workers. The authors used gas chromatography/mass spectrometry to analyze 22 polycyclic aromatic hydrocarbons that were collected. The absolute concentration of pyrene was highest in the fine-particle emission fraction for trucks, buses, and passenger cars; however, fine particles in truck and bus exhausts contained higher pyrene concentrations than the corresponding size fraction of particles emitted from passenger cars. Truck and bus emissions contained a higher concentration of pyrene than car emissions because trucks and buses produced greater amounts of fine and coarse particles, and their fine particles contained higher concentrations of pyrene.
authors.affiliation: School of Public Health National Defence Medical Center Taipei, Taiwan, Republic of China.
authors.forename: Ching-Huang
authors.initials: CH
authors.lastname: Lai
authors.forename: Saou-Hsing
authors.initials: SH
authors.lastname: Liou
authors.forename: Tung-Sheng
authors.initials: TS
authors.lastname: Shih
authors.forename: Perng-Jy
authors.initials: PJ
authors.lastname: Tsai
authors.forename: Hsiao-Lung
authors.initials: HL
authors.lastname: Chen
authors.forename: Timothy J
authors.initials: TJ
authors.lastname: Buckley
authors.forename: Paul T
authors.initials: PT
authors.lastname: Strickland
authors.forename: Jouni J K
authors.initials: JJ
authors.lastname: Jaakkola
mesh_terms: D008685:Meteorological Concepts; D018986:Motor Vehicles; D010316:Particle Size; D011084:Polycyclic Aromatic Hydrocarbons / Q000032:analysis; D011721:Pyrenes / Q000032:analysis*; D013624:Taiwan; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D011084:Polycyclic Aromatic Hydrocarbons; D011721:Pyrenes; D001335:Vehicle Emissions