title: Tentative method of analysis for ammonia in the atmosphere (indophenol method).
mesh_terms: D000397:Air Pollution / Q000032:analysis*; D000641:Ammonia / Q000032:analysis*; D007202:Indicators and Reagents; D007215:Indophenol; D008722:Methods; D012494:Sampling Studies
chemical_list: D007202:Indicators and Reagents; D007215:Indophenol; D000641:Ammonia