title: A gas chromatographic method for exhaust gas analysis.
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D002849:Chromatography, Gas; D008722:Methods; D009589:Nitrogen Oxides / Q000032:analysis*; D001335:Vehicle Emissions / Q000032:analysis*
chemical_list: D009589:Nitrogen Oxides; D001335:Vehicle Emissions