Ny norsk standard er publisert: NS-EN ISO 23210 Utslipp fra stasjonære kilder – Bestemmelse av PM10/PM2,5 massekonsentrasjon i røykgass – Måling ved lav konsentrasjon med bruk av impaktor.
In order to quantify the amount of PM10 and PM2,5 particles in stationary source emissions or to identify the contribution sources of PM10 and PM2,5 in ambient air, it is necessary to measure fine particulate matter in the flue gas of industrial sources.
This International Standard describes a measurement method for the determination of mass concentrations of PM10 and PM2,5 emissions, which realizes the same separation curves as those specified in ISO 7708:1995 for PM10 and PM2,5 in ambient air. The method is based on the principle of impaction. During sampling, the particle fraction is divided into three groups with aerodynamic diameters greater than 10 μm, between 10 μm and 2,5 μm and smaller than 2,5 μm.
The measurement method allows the simultaneous determination of concentrations of PM10 and PM2,5 emissions. The method is designed for stack measurements at stationary emission sources.
The contribution of stationary source emissions to PM10 and PM2,5 concentrations in ambient air can be classified as primary and secondary. Those emissions that exist as particulate matter within the stack gas and that are emitted directly to air can be considered “primary”. Secondary particulate consists of those emissions that form in ambient air due to atmospheric chemical reactions. The measurement technique in this International Standard does not measure the contribution of stack emissions to the formation of secondary particulate matter in ambient air.