DeutschNitrogen dioxide is a nasty smelling important air pollutant in urban areas and cities. It contributes to the formation of smog and can severely impact human health if exceeding a certain concentration. Major sources of nitrogen dioxide are the burning of fossil fuels, motor vehicle exhaust, petrol and metal refining, electricity generation and other manufacturing industries.
Short term sampling
The passive samplers to measure nitrogen dioxide are based on the principle of the NO2 diffusion onto the absorbent triethanolamine. The collected NO2 is then determined spectrophotometrically by the well-established Saltzmann method. Being designed for running without power supply, the samplers are optimized to operate in challenging environments.
The passive sampler to measure short term nitrogen dioxide consists of a polypropylene housing with a specific opening of 20 mm in diameter. A glass fiber membrane is attached and supported by a wire net in order to eliminate all kinds of meteorological disturbances. The sampler is placed in a specially designed shelter to protect it during its exposure.
