Table 4.
Ranking of the ten most important background VOCs for O3, OH, and NO3 loss in residences and the percentage of O3, OH, and NO3 loss for which those VOCs are responsible.
| Rank | O3/VOCi | % O3 lossa | OH/VOCi | % OH lossb | NO3/VOCi | % NO3 lossc |
|---|---|---|---|---|---|---|
| 1 | d-Limonene | 68% | d-Limonene | 24% | d-Limonene | 59% |
| 2 | α-Pinene | 26% | Ethanol | 16% | α-Pinene | 26% |
| 3 | 3-Carene | 3.3% | Formaldehyde | 9.7% | 3-Carene | 12% |
| 4 | Isoprene | 1.2% | 2-Butanol | 9.1% | β-Pinene | 1.0% |
| 5 | β-Pinene | 0.44% | α-Pinene | 6.5% | Isoprene | 0.96% |
| 6 | Styrene | 0.38% | Acetaldehyde | 6.2% | Styrene | 0.48% |
| 7 | 2-Carene | 0.17% | Isoprene | 4.1% | Ethanol | 0.33% |
| 8 | 1,3-Butadiene | 0.061% | Hexanal | 3.4% | 2-Carene | 0.20% |
| 9 | Crotonaldehyde | 0.033% | 3-Carene | 3.4% | 2-Butanol | 0.074% |
| 10 | Acrolein | 0.014% | Toluene | 1.6% | Acetaldehyde | 0.037% |
a
Total loss rate for O3 to VOCs was 6.6 × 10–2 h–1.
b
Total loss rate for OH to VOCs was 1.5 × 105 h–1.
c
Total loss rate for NO3 to VOCs was 4.5 × 103 h–1.