Relationship between concentrations of pyrene and aerosol size distribution in traffic exhausts in Taipei, Taiwan

Research output: Contribution to journalArticle


  • CH Lai
  • SH Liou
  • TS Shih
  • PY Tsai
  • HL Chen
  • T Buckley
  • P Stickland


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.


Original languageEnglish
Pages (from-to)624-632
Number of pages9
JournalArch Environ Health
Publication statusPublished - 1 Oct 2003