Table 2.
Composition of polycyclic aromatic hydrocarbons (PAHs) of the extracted PM samples (ng/mg particles) generated from combustion of solid fuels or diesel exhaust particles (DEP, NIST 2975)
| Dung | Wood | Charcoal | DEP | |||||
|---|---|---|---|---|---|---|---|---|
| ng/mg | % | ng/mg | % | ng/mg | % | ng/mg | % | |
| PAHs | 351.6 | 56.9 | 2831.0 | 88.0 | 114.7 | 84.7 | 41.3 | 35.1 |
| Alkyl-PAHs | 99.0 | 16.0 | 104.7 | 3.3 | 7.4 | 5.5 | 6.8 | 5.8 |
| DBTs | 4.6 | 0.7 | 0.7 | 0.0 | 0.3 | 0.2 | 1.0 | 0.9 |
| Nitro-PAHs | 88.7 | 14.4 | 43.7 | 1.4 | 5.7 | 4.2 | 48.0 | 40.9 |
| Oxy-PAHs | 73.9 | 12.0 | 238.6 | 7.4 | 7.3 | 5.4 | 20.4 | 17.3 |
| Total | 617.7 | 100.0 | 3218.6 | 100.0 | 135.5 | 100.0 | 117.6 | 100.0 |
The PAHs are given in groups of native PAHs and PAH derivatives: alkylated species (alkyl-PAHs), dibenzothiophenes (DBTs), nitrated and oxygenated PAHs (nitro-PAHs and oxy-PAHs). A full list of measured individual compounds can be found in Table S1