TABLE 2.
Mixed vehicle emissions chemical characteristics
| Exposure atmosphere composition | Units | Control | MVE |
|---|---|---|---|
| Filter sample, chamber | µg/m³ | 10.0 ± 8.0 | 328.0 ± 73.0 |
| Elemental carbon | µg/m³ | 0.4 | 248.3 ± 3.1 |
| Organic carbon | µg/m³ | 5.2 ± 0.1 | 37.7 ± 2.2 |
| Ammonium | ng/m³ | 0.0 | 2080.4 ± 23.3 |
| Sulfate | ng/m³ | 137.3 ± 0.03 | 3613.2 ± 13.5 |
| Nitrate | ng/m³ | 63.3 ± 0.13 | 2448.6 ± 34.7 |
| Elements (metals) | ng/m³ | 253.7 ± 10.5 | 2541.9 ± 34.1 |
| Alkanes | µg/m³ | 2.2 ± 0.1 | 29.7 ± 1.7 |
| Carbonyl | µg/m³ | 24.7 ± 1.8 | 58.8 ± 3.5 |
| Polycyclic aromatic hydrocarbon (PAH) | µg/m³ | 1.4 ± 0.1 | 21.9 ± 1.2 |
| Nitro-PAH | ng/m³ | 0.4 ± 0.1 | 22.3 ± 1.8 |
| Polar (acids) | µg/m³ | 3.1 ± 0.3 | 21.7 ± 1.6 |
| Hopane and steranes | ng/m³ | 2.2 ± 0.2 | 37.2 ± 2.9 |
| Volatile organic carbon (VOC) | µg/m³ | 92.6 ± 6.81 | 6653.5 ± 406.3 |