Descriptors | Effluents (sewage), Potable water, Ammonium inorganic compounds, Accuracy, Water resources, Chemical analysis and testing, Precision, Wastes, Sewage, Ammoniacal nitrogen, Interferences (chemical), Water testing, Colorimetry, Determination of content, Calibration, Ammonia, Absorptiometry, Quality, Photometry (chemical analysis), Distillation methods of analysis, Spectrophotometry, Seawater, Ion-exchange methods, Water |