Good Class criteria. The average OC/EC ratios ranged from 2.6 to 17 in PM10 and from 4.2 to 18 in PM2.5 at two temples, which suggested that OC measured in these two temple areas may be due to both direct emission from incense burning and secondary formation by chemical reactions.
The total mass of inorganic ions, organic carbon, and elemental carbon accounted for about 71% in PM2.5 and 72% in PM10.