Download GRA N2O chamber methodology guidelines: Recommendations for air sample collection, storage, and analysis

∙ Inert pre-evacuated septum-sealed vials are recommended for air sample collection fromchambers.
∙ Adequate flushing and overpressuring gas in the vial helps to maintain sample integrity.
∙ Short storage times and concurrent storage of standards is important for quality assurance.
∙ Standard gas chromatography methods are summarized along with alternative detectors.
∙ Traceable gas standards enable accurate and intercomparable gas concentration estimates.