The Importance of Ammonia Gas

Ammonia (NH3) is one of the most common pollutants that pose a threat to human health and cause serious environmental problems. According to relevant reports, chronic lung disease is related to the inhalation of ammonia gas. Ammonia deposition can cause eutrophication of water bodies and soil acidification, leading to forest soil erosion and reduced biodiversity, posing a threat to ecosystems. Meanwhile, as the most abundant alkaline gas in the atmosphere, ammonia can easily form ammonium ions (NH4+) with water and react with acidic precursors such as SO2 and NOx (NO+NO2) to generate secondary aerosols, which have a significant impact on the formation of haze. Therefore, accurately measuring the concentration of ammonia and understanding the emission sources of ammonia and its impact on the formation of secondary particles can help clarify the mechanism of atmospheric composite pollution.

Accurately identifying and quantifying the characteristics and sources of ammonia is particularly important for studying the formation mechanism of atmospheric pollution and improving the simulation performance of models. It is necessary to invest more and more ammonia measurements in field observations to better understand the transformation process of ammonia in atmospheric chemistry and the impact of atmospheric chemical products it brings.

Principles of Instrument Measurement

This instrument applies wet chemical sampling and optical detection methods for in-situ online measurement of ammonia content in gases. The measured ammonia is converted into indophenol blue through chemical methods, and the ammonia concentration is determined by measuring the light absorption along a long path.