Fig. 5.

Relative PAH contents and benzo[a]pyrene equivalent values in PMs. PAHs were extracted from five samples of PM with dichloromethane, and PAH concentrations were determined by GC-MS. The data were averaged from 3 independent experiments. A. Relative PAH concentrations are shown as total PAH amounts in each PM set to 1. B. Benzo[a]pyrene equivalent values (BaPeq) of PAHs in PM were calculated according to previous reports that described CALUX analysis of PAHs. The exact procedure is described in the Materials and Methods.