title: Spectrophotometric determination of nitrate ion in fresh water.
mesh_terms: D005069:Evaluation Studies as Topic; D005618:Fresh Water / Q000032:analysis*; D007202:Indicators and Reagents; D008722:Methods; D008832:Microchemistry; D009566:Nitrates / Q000032:analysis*; D014867:Water / Q000032:analysis*; D014877:Water Pollution, Chemical
chemical_list: D007202:Indicators and Reagents; D009566:Nitrates; D014867:Water