Table 5. Carbonyl compounds in the gas phase of sidestream and mainstream CS.
P values were calculated using Student's unpaired t test.
| Sidestream | Mainstream | |||||
|---|---|---|---|---|---|---|
| Compound (μg/m3) | 250 mg/m3 | 500 mg/m3 | P value | 250 mg/m3 | 500 mg/m3 | P value |
| Formaldehyde | 207.6 | 318.7 | 0.02 | 477.8 | 1027.5 | 0.00 |
| Acetaldehyde | 8000.0 | 11000.0 | 0.00 | 11900.0 | 32300.0 | 0.00 |
| Propanal | 330.5 | 492.2 | 0.00 | 415.4 | 1229.9 | 0.00 |
| Acetone | 2290.0 | 3120.0 | 0.00 | 2860.0 | 9700.0 | 0.00 |
| Acrolein | 139.7 | 263.6 | 0.00 | 336.1 | 746.6 | 0.01 |
| Methacrolein | 108.1 | 204.5 | 0.00 | 243.7 | 711.3 | 0.00 |
| Crotonaldehyde | 144.0 | 279.9 | 0.00 | 152.0 | 317.9 | 0.00 |
| Isobutanal | 128.3 | 228.2 | 0.00 | 131.2 | 318.2 | 0.00 |
| Butanal | 312.0 | 521.2 | 0.01 | 220.4 | 816.8 | 0.00 |
| Butan-2-one | 629.5 | 823.0 | 0.02 | 329.3 | 934.3 | 0.00 |
| Isopentanal | 241.1 | 432.2 | 0.00 | 221.5 | 548.9 | 0.00 |
| Butan-2,3-dione | 310.8 | 635.4 | 0.00 | 312.9 | 753.9 | 0.00 |