Table 1—

PM10 concentrations, radical-generating capacity and polycyclic aromatic hydrocarbons (PAH) concentrations

PM10 µg·m−3Oxygen radicals# AU·m−3Carbon-centred radicals# AU·m−3Unidentified radicals# AU·m−3Total PAH concentration ng·m−3
Church pre-service16352.30016.4
Church post-service65819.812.53.952.9
Chapel before candle burning23353.70011.2
Chapel after candle burning101360.8045.6110.0
High-traffic outdoor locations+536.3007.4
  • PM10: particulate matter passing through a size-selective inlet with a 50% efficiency cut-off at a 10-µm aerodynamic diameter. #: radical-generating capacity, detected and identified as 5,5-dimethyl-1-pyrroline-N-oxide spin-trapped radical adducts, expressed in peak area (arbitrary units (AU)) per m3; : sum of 16 individual compounds analysed by HPLC, expressed in ng·m−3; +: >45,000 motorised vehicles per day