Methane, 23 times more potent than CO 2, 1 1 Bessou, C. 2 2 CO2 Emissions from Fuel Combustion, International Energy Agency, Paris, France, 2016,, accessed October 2018. CO 2 accounts for 77% of total GHG emissions (32 Gt CO 2 in 2014), with the transport sector responsible for 23% of total fossil fuel-related emissions. Global atmospheric concentrations of primary greenhouse gases (GHG) such as carbon dioxide (CO 2) and methane (CH 4), produced by natural sources and by human activities involving fossil fuels and changes in land use, have increased significantly, with a sharp rise in the last decade. Greenhouse gases analysis artifact containers gas sampling However, CO analysis in the column with a polystyrene-divinylbenzene stationary phase (Method 1) produced an artifact due to the presence of oxygen in the samples, restricting its quantification. The tests conducted with real and synthetic gas samples under optimized chromatography conditions using both methods indicated satisfactory performance for CO 2 and CH 4 quantification. For larger volume samples, multilayer foil bags are the most stable for the compounds analyzed.
Gas chromatography analysis of sample stability and container reusability demonstrated that borosilicate flasks with butyl rubber and PTFE/silicone septa are ideal for storing samples, allowing up to 5 successive sampling cycles with no significant loss of recovery. Two chromatographic methods were applied, using different analysis conditions and columns.
Finally, procedures for the sampling, storage and analysis of CO 2 and CH 4 were evaluated and optimized. To that end, standard samples containing the gases of interest (CO 2, CH 4 and CO) and different types of real samples were tested. The objectives of this study were twofold: to assess two chromatographic methods for the analysis of greenhouse gases (GHG) and carbon monoxide, and to propose and evaluate a low-cost and reusable alternative system for their sampling and storage, using 10 different container configurations (flasks and bags).
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