Table 1.
Concentrations of aldehydes in pre-, during-, and post-Olympic periods (unit: μg/m3)*
| Pre-Olympics | During-Olympics | Post-Olympics | Whole period | |||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
|
| ||||||||||||||||
| Mean | SD | Min | Max | Mean | SD | Min | Max | Mean | SD | Min | Max | Mean | SD | Min | Max | |
|
| ||||||||||||||||
| Formaldehyde | 35.7 | 9.0 | 15.8 | 60.1 | 37.3 | 11.2 | 17.1 | 68.6 | 13.3 | 13.9 | 1.0 | 57.5 | 29.3 | 15.1 | 1.0 | 68.6 |
| Acetaldehyde | 35.2 | 15.1 | 15.7 | 67.2 | 23.8 | 14.7 | 2.0 | 63.9 | 20.6 | 13.6 | 3.3 | 62.4 | 27.1 | 15.7 | 2.0 | 67.2 |
| Acrolein | 2.4 | 0.9 | 1.0 | 4.5 | 2.9 | 0.8 | 1.8 | 4.6 | 1.4 | 0.5 | 0.6 | 2.5 | 2.3 | 1.0 | 0.6 | 4.6 |
*
Concentrations were field blank corrected; average concentration of aldehydes was calculated if the duplicated samples were collected.