Carbon monoxide is a temporary pollutant especially in urban areas and cities. It is colorless, odorless, tasteless and toxic if exceeding a certain concentration. Large CO pollution events can be observed over cities, mainly caused through combustion engines and fuels.
The passive samplers to measure Carbon monoxide is based on the principle of the diffusion of CO molecules onto the absorbing medium Palladium chloride. The formed metallic Palladium can then photometrically be determined by a specific reaction. The samplers are composed of a polypropylene housing with an opening of 20 mm in diameter. To exclude wind and weather disturbances, a glass fiber supported by a wire net is attached and set up in a protective shelter.
Based on good practice, one or two weeks of exposure allow a precise pollution estimate, if the eight hours limit value is exceeded.