Analysis and interpretation of the monitoring data for C₂–C₁₁ hydrocarbons in the atmosphere of a rural Portuguese site
by Celia Alves, Paulo Gomes, Casimiro Pio
International Journal of Environment and Pollution (IJEP), Vol. 32, No. 3, 2008

Abstract: This paper focuses the application of a measurement technique for determining atmospheric C₂–C₆ hydrocarbons after canister sampling and analysis by gas chromatography/flame ionisation detection (GC/FID), as well of an adsorption-sampling technique for C₆–C₁₁ compounds and GC/FID analysis after thermal desorption and cryogenic concentration. Tens of samples collected at Giesta, a rural area located 20 km to the SE of the coastal Portuguese city of Aveiro, were analysed. The characterisation of C₂ C₁₁ hydrocarbons is presented, considering seasonal variations, diurnal cycles, the influence of air masses and different photochemical conditions. Ratios between hydrocarbons and principal components analysis were applied to differentiate between biogenic and anthropogenic sources.

Online publication date: Wed, 23-Apr-2008

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