Factory wholesale cheap price water detectors COD/Ammonia Nitrogen/Total Nitrogen PH water detectors

Online ammonia nitrogen analyzers usually use colorimetric or photometric methods to measure ammonia nitrogen. The basic principle of these two methods is to react ammonia nitrogen in water samples with reagents through staining or chemical reactions, producing a color or optical signal, and then determining the concentration of ammonia nitrogen by measuring the intensity of this signal. Specifically, the commonly used colorimetric method is the nitrogen molybdate method, which involves reacting ammonia nitrogen in a water sample with ammonium molybdate reagent and reducing agent to produce a blue mixture. The absorbance of the mixture is measured by colorimetric method, and the concentration of ammonia nitrogen is determined based on the standard curve. The commonly used photometric method is denitrification photometry, which converts ammonia nitrogen in water samples into nitrite, and then reacts with sodium phthalate reagent to generate a purple red compound. The absorbance of the compound is measured by a photometer, and the concentration of ammonia nitrogen is determined based on the standard curve.