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The change in concentration of suspended particulate matter (SPM) in indoor and outdoor air in the Tokyo metropolitan area was studied using a new portable sampler (SPMP-sampler). The relationship between the airborne particle concentration in indoor and outdoor air varied with the aerodynamic diameters of the particles. The concentration of the SPM in indoor air increased in proportion to that in outdoor air. The polycyclic aromatic hydrocarbon (PAH) concentration in SPM also varied with the aerodynamic diameters of the particles. Fine particles with diameters of less than 2 microns contained high concentrations of PAH. The PAH concentration in indoor air increased in proportion to that in outdoor air. There were significant correlations between the concentrations of B(k)F, B(a)P, and B(ghi)P in indoor air. The mutagenic activities in the airborne particles also varied with the aerodynamic diameters of the particles. Fine particles with diameters of less than 2 microns had high mutagenic activities.

The suspended particulate matter(SPM) and polycyclic aromatic hydrocarbons(PAHs) in indoor and outdoor air along a main road.