Inhaled exposure characteristics
| Condition | PM2.5 (μg/m3) | Particle No. (cm3) | CO (ppm) | NO (ppb) | NOx (ppb) | NO2 (ppb) | NO2/PM# (μg/#) |
|---|---|---|---|---|---|---|---|
| Filtered air | 8.2 (6.9) | 1750.4 (235.1) | 2.8 (0.1) | 25.3 (5.0) | 71.1 (9.8) | 45.9 (7.7) | 4.9×10−9 |
| Diesel exhaust | 302.0 (30.5) | 5.4×105 (6.4×104) | 14.1 (2.0) | 8665.5 (1287.1) | 9185.3 (1366.1) | 519.7 (118.6) | 1.8×10−9 |
Values are mean (SD).
CO, carbon monoxide; NO, nitrous oxide; NOx, Oxides of nitrogen; NO2, nitrogen dioxide; PM, particulate matter; PM2.5, particulate matter of 2.5 µ or less by aerodynamic diameter.