Table 1. Comparison of various components of CAPs in the different exposures in Grand Rapids and in Detroit.
OC represents organic carbon and EC represents elemental carbon.
| Day | Mass | OC | EC | Nitrate | Sulfate | Ammonium | Crustal/Urban dust |
|---|---|---|---|---|---|---|---|
| BN rats 1 day exposure- Grand Rapids | |||||||
| Day 1 | 519 | 280 | 7 | 23 | 58 | 51 | 36 |
| BN rats 3 day exposure- Grand Rapids | |||||||
| Day 1 | 388 | 140 | 3 | 4 | 106 | 50 | 14 |
| Day 2 | 492 | 222 | 3 | 13 | 59 | 30 | 15 |
| Day 3 | 904 | 198 | 8 | 35 | 417 | 81 | 20 |
| Avg | 595 | 187 | 4 | 18 | 194 | 54 | 16 |
| JCR rats 4 day exposure- Detroit | |||||||
| Day 1 | 289 | 128 | 7 | 20 | 59 | 28 | 29 |
| Day 2 | 448 | 150 | 16 | 31 | 63 | 20 | 62 |
| Day 3 | 251 | 121 | 7 | 36 | 64 | 31 | 35 |
| Day 4 | 176 | 92 | 12 | 6 | 21 | 9 | 27 |
| Avg | 291 | 123 | 10 | 23 | 52 | 22 | 38 |