title: Spectrophotometric determination of nitrite in waters with 5,7-dihydroxy-4-imino-2-oxochroman.
mesh_terms: D003374:Coumarins; D005618:Fresh Water / Q000032:analysis*; D009573:Nitrites / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet / Q000379:methods; D014867:Water / Q000032:analysis*; D014873:Water Pollutants / Q000032:analysis*; D014874:Water Pollutants, Chemical / Q000032:analysis*
chemical_list: D003374:Coumarins; D009573:Nitrites; D014873:Water Pollutants; D014874:Water Pollutants, Chemical; D014867:Water; C043224:5,7-dihydroxy-4-imino-2-oxochroman