To obtain timely data for the purpose of air quality assessment, air quality trend
reporting, air quality index reporting and to meet the requirements for inclusion of the
data in provincial and national air quality databases, a continuous method of analyzing
Nitric Oxide (NO), Oxides of Nitrogen (NOx), and Nitrogen Dioxide (NO2) concentrations
in ambient air is used. This method is capable of measurement updates at a rate of once
every five minutes or faster. Readings from instruments of this method enables the
calculation of hourly averaged concentrations of NO2. Commercially available NO2
analyzers are used in the method.
