Tab. IV.9.1.1 Stations with average annual concentrations of VOC
in the ambient air
| Volatile organic compound | Annual average [µg.m-3] |
||||||||||
| Košetice | Praha 4-Libuš | ||||||||||
| 1997 | 2001 | 2005 | 2009 | 2013 | 1997 | 2001 | 2005 | 2009 | 2013 | ||
| Alkane | Ethane | 2.64 | 2.27 | 2.08 | 2.30 | 2.41 | 3.27 | 2.70 | 2.45 | 2.33 | 2.51 |
| Propane | 1.60 | 1.38 | 1.21 | 1.15 | 1.19 | 2.55 | 1.92 | 1.66 | 1.45 | 1.59 | |
| 2-Methylpropane | 0.61 | 0.50 | 0.38 | 0.37 | 0.31 | 1.30 | 0.90 | 0.81 | 0.81 | 0.73 | |
| Butane | 1.03 | 0.77 | 0.61 | 0.57 | 0.50 | 2.00 | 1.58 | 1.03 | 0.91 | 0.86 | |
| 2-Methylbutane | 0.87 | 0.68 | 0.43 | 0.32 | 0.32 | 2.48 | 1.69 | 0.89 | 0.69 | 0.60 | |
| Pentane | 0.57 | 0.40 | 0.29 | 0.24 | 0.24 | 1.51 | 0.83 | 0.53 | 0.45 | 0.46 | |
| 2-Methylpentane | 0.31 | 0.42 | 0.27 | 0.15 | 0.16 | 1.00 | 0.90 | 0.47 | 0.33 | 0.28 | |
| Hexane | 0.29 | 0.18 | 0.09 | 0.10 | 0.08 | 1.77 | 0.36 | 0.16 | 0.16 | 0.13 | |
| Heptane | 0.10 | 0.06 | 0.03 | 0.06 | 0.05 | 0.49 | 0.17 | 0.07 | 0.11 | 0.11 | |
| 2,2,4-Trimethylpentane | 0.05 | 0.02 | 0.01 | 0.03 | 0.02 | 0.22 | 0.06 | 0.02 | 0.04 | 0.03 | |
| Oktane | 0.06 | 0.05 | 0.02 | 0.05 | 0.03 | 0.25 | 0.14 | 0.06 | 0.07 | 0.05 | |
| Alkene | Ethene | 1.46 | 1.11 | 0.78 | 0.67 | 0.55 | 2.95 | 2.08 | 1.33 | 0.68 | 0.74 |
| Propene | 0.31 | 0.26 | 0.15 | 0.18 | 0.17 | 0.85 | 0.57 | 0.34 | 0.26 | 0.25 | |
| sum of Butene | 0.32 | 0.29 | 0.14 | 0.32 | 0.16 | 1.18 | 0.76 | 0.42 | 0.55 | 0.25 | |
| sum of Pentene | 0.09 | 0.08 | 0.05 | 0.10 | 0.02 | 0.50 | 0.42 | 0.28 | 0.17 | 0.04 | |
| Isoprene | 0.09 | 0.14 | 0.09 | 0.22 | 0.14 | 0.26 | 0.34 | 0.38 | 0.73 | 0.12 | |
| Arene | Benzene | 0.92 | 0.76 | 0.42 | 0.54 | 0.63 | 1.62 | 1.33 | 0.62 | 0.64 | 0.76 |
| Toluene | 0.70 | 0.69 | 0.31 | 0.39 | 0.37 | 2.48 | 1.92 | 0.87 | 0.94 | 0.86 | |
| Ethylbenzene | 0.14 | 0.14 | 0.06 | 0.08 | 0.08 | 0.52 | 0.52 | 0.19 | 0.16 | 0.27 | |
| m,p-Xylene | 0.25 | 0.32 | 0.14 | 0.15 | 0.18 | 1.14 | 1.37 | 0.55 | 0.40 | 0.74 | |
| o-Xylene | 0.12 | 0.12 | 0.05 | 0.05 | 0.11 | 0.49 | 0.45 | 0.16 | 0.13 | 0.26 | |