< Graphic Yearbook


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
1995 2000 2005 2010 2016 1995 2000 2005 2010 2016
Alkane Ethane 2.33 1.83 2.08 2.53 1.97 3.62 2.75 2.43 1.94 1.81
Propane 1.80 1.28 1.21 1.28 1.01 2.15 1.71 1.65 1.82 1.13
2-Methylpropane 0.68 0.61 0.37 0.47 0.31 1.14 0.80 0.80 1.03 0.52
Butane 1.16 0.76 0.60 0.71 0.47 1.76 1.35 1.02 1.15 1.05
2-Methylpentane 0.68 0.61 0.37 0.47 0.31 1.14 0.80 0.80 1.03 0.52
Pentane   0.39 0.29 0.35 0.24 1.21 0.79 0.52 1.74 0.35
Hexane   0.17 0.09 0.11 0.21 0.60 0.41 0.16 0.18 0.22
Heptane   0.05 0.03 0.06 0.10 0.30 0.14 0.07 0.14 0.15
Alkene Ethene 1.28 0.82 0.78 0.55 0.62 2.52 1.69 1.32 0.45 0.86
Propene 0.32 0.21 0.15 0.16 0.19 0.68 0.45 0.34 0.30 0.20
sum of Butene   0.20 0.14 0.20 0.28 0.87 0.51 0.42 0.38 0.36
sum of Pentene   0.05 0.05 0.07 0.07   0.26 0.27 0.14 0.08
Isoprene 0.14 0.11 0.09 0.13 0.25   0.34 0.38 0.47 0.55
Aromatic hydrocarbons Benzene 1.04 0.74 0.42 0.58 0.45 1.51 1.20 0.62 0.72 0.48
Toluene 0.99 0.60 0.31 0.40 0.38 2.07 1.63 0.86 0.94 0.64
m.p-Xylene 1.28 0.82 0.78 0.55 0.56 1.42 0.92 0.55 0.57 0.84

 

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