Fig. 8From: Cytotoxic and inflammatory potential of size-fractionated particulate matter collected repeatedly within a small urban areaPrincipal component analysis of size-fractionated particulate matter according to polycyclic aromatic hydrocarbon (PAH) composition. Inset: Mass concentration of total PAHs and acenaphthylene (ACL) per volume of air, ng/m3. Black fill, industrial site (W1); grey fill, traffic site (W2)Back to article page