Constituents of secondhand smoke (SHS) in air and air changes per hour (ACH) in stationary cars
| 1-h Time-integrated averages for SHS constituents* | ||||
|---|---|---|---|---|
| Subjects | Nicotine (μg/m3) | PM2.5 (μg/m3) | Carbon monoxide (ppm) | ACH (h−1) |
| 1 | 4.8 | 806 | 2.7 | 1.4 |
| 2 | 12.2 | 656 | 1.2 | 1.6 |
| 3 | 8.0 | 1027 | 1.6 | 3.2 |
| 4 | 5.1 | n/a | 0.4 | n/a |
| 5 | 9.1 | n/a | 1.2 | 1.8 |
| 6 | 9.7 | 1090 | 1.7 | 2.4 |
| 7 | 21.4 | 513 | 1.1 | 1.8 |
| 8 | 6.0 | 384 | 0.9 | 1.3 |
| Average±SD | 9.5±5.4 | 746±281 | 1.4±0.7 | 1.9±0.7 |
*Values presented are 1-h time-integrated averages corrected for background ambient concentrations. Air exchanges per hour are for back seat measurements.
n/a, not available.