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 | |||||||||||
1994 | 1998 | 2002 | 2006 | 2010 | 2014* | 1998 | 2002 | 2006 | 2010 | 2014* | ||
Alkane | Ethane | 2.47 | 2.58 | 2.63 | 2.22 | 2.51 | 2.57 | 3.36 | 2.97 | 2.58 | 1.94 | 2.46 |
Propane | 1.40 | 1.59 | 1.47 | 1.25 | 1.28 | 1.32 | 2.37 | 1.98 | 1.76 | 1.82 | 1.41 | |
2-Methylpropane | 1.06 | 0.97 | 0.82 | 0.58 | 0.71 | 0.64 | 1.82 | 1.44 | 1.04 | 1.15 | 0.78 | |
Butane |
– |
0.08 | 0.09 | 0.06 | 0.52 | 0.04 | 0.25 | 0.25 | 0.12 | 0.11 | 0.07 | |
2-Methylbutane | 0.63 | 0.53 | 0.42 | 0.30 | 0.35 | 0.29 | 1.24 | 0.75 | 0.53 | 1.74 | 0.40 | |
Pentane |
– |
0.06 | 0.04 | 0.01 | 0.03 | 0.20 | 0.94 | 0.90 | 0.45 | 0.31 | 0.11 | |
2-Methylpentane | 0.92 | 0.28 | 0.22 | 0.10 | 0.11 | 0.09 | 1.01 | 0.33 | 0.16 | 0.18 | 0.11 | |
Hexane |
– |
0.11 | 0.06 | 0.03 | 0.06 | 0.16 | 0.37 | 0.16 | 0.10 | 0.14 | 0.20 | |
Heptane |
– |
0.07 | 0.06 | 0.02 | 0.49 | 0.06 | 0.17 | 0.11 | 0.06 | 0.09 | 0.07 | |
Alkene | Ethene | 1.13 | 1.21 | 1.19 | 0.96 | 0.55 | 0.77 | 2.39 | 2.20 | 1.59 | 0.45 | 0.94 |
Propene | 0.40 | 0.28 | 0.28 | 0.19 | 0.16 | 0.17 | 0.67 | 0.62 | 0.42 | 0.30 | 0.24 | |
sum of Butene | 0.43 | 0.25 | 0.40 | 0.12 | 0.20 | 0.20 | 0.88 | 0.75 | 0.48 | 0.38 | 0.29 | |
sum of Pentene |
– |
0.08 | 0.11 | 0.18 | 0.07 | 0.04 | 0.41 | 0.38 | 0.27 | 0.14 | 0.06 | |
Isoprene | 0.14 | 0.09 | 0.11 | 0.10 | 0.13 | 0.15 | 0.36 | 0.53 | 0.36 | 0.47 | 0.43 | |
Arene | Benzene | 1.24 | 0.93 | 0.79 | 0.51 | 0.58 | 0.51 | 1.48 | 1.20 | 0.74 | 0.72 | 0.53 |
Toluene | 1.15 | 0.90 | 0.72 | 0.30 | 0.40 | 0.37 | 2.51 | 1.97 | 0.77 | 0.94 | 0.69 | |
Ethylbenzene | 0.19 | 0.15 | 0.15 | 0.07 | 0.06 | 0.25 | 0.51 | 0.43 | 0.18 | 0.18 | 0.37 | |
m,p-Xylene | 0.41 | 0.27 | 0.35 | 0.15 | 0.14 | 0.42 | 1.20 | 1.22 | 0.51 | 0.57 | 0.76 | |
o-Xylene | 0.15 | 0.12 | 0.13 | 0.05 | 0.04 | 0.28 | 0.51 | 0.45 | 0.16 | 0.14 | 0.36 |
*Insufficient valid data