title: The determination of nitrate in waters at low p.p.m. levels by automatic discrete-sample analysis.
mesh_terms: D001322:Autoanalysis / Q000379:methods*; D008832:Microchemistry; D009566:Nitrates / Q000032:analysis*; D013056:Spectrophotometry, Ultraviolet; D014873:Water Pollutants / Q000032:analysis*
chemical_list: D009566:Nitrates; D014873:Water Pollutants