Field intercomparison of diffusive samplers for measuring ammonia.

摘要: Agricultural production systems are recognised as a major source of atmospheric ammonia. Deposition ammonia and ammonium may contribute to undesired changes in oligotrophic ecosystems. The continuous measurement requires expensive sophisticated techniques is performed only very restrict number ambient air stations Europe. Therefore, the application passive samplers, which have advantage being easy handle cost-efficient, useful. In past comparability different samplers must be considered rather scarce. joint European project under leadership GSF-Forschungszentrum fur Umwelt und Gesundheit, Neuherberg, 1997 comparison monitoring methods was carried out prealpine rural site near Garmisch-Partenkirchen. It valuable include not well established but also still developed. For comparative test ten working groups with took part. A wet annular denuder system, has been developed by Netherlands Energy Research Foundation for on-line ammonia, served reference methods. experiment, started June finished December, showed that most fulfil requirements can recommended further measurements. Additional measurements meteorological parameters were check influences weather conditions on sampling.