title: Determination of the ammonium content in waste waters by means of the air-gap electrode.
mesh_terms: D000641:Ammonia / Q000032:analysis*; D004566:Electrodes; D005618:Fresh Water / Q000032:analysis; D008722:Methods; D012722:Sewage / Q000032:analysis; D014873:Water Pollutants / Q000032:analysis; D014877:Water Pollution, Chemical / Q000032:analysis*
chemical_list: D012722:Sewage; D014873:Water Pollutants; D000641:Ammonia