To obtain timely data for the purpose of air quality assessment, air quality trend reporting
and to meet the requirements for inclusion of the data in provincial and national air
quality databases, a continuous method of analyzing ethylene (C2H4) concentrations in
ambient air is used. This method is capable of measurement updates at a rate of once
every four minutes for calculations of an hourly average. Commercially available gas
chromatography based reduced gas detection (RGD) analyzers are used in the method.