Unregulated discharge of ammonia nitrogen-containing wastewater can lead to difficulties in drinking water supply for humans and livestock, and even severe poisoning incidents, which have actually occurred in reality. Therefore, Water Quality Monitoring is of vital importance. The purpose of monitoring ammonia nitrogen in wastewater is to ensure water safety.
In daily life, many people have heard of cyanobacterial blooms that have caused shortages of drinking water for residents and severely polluted relevant water areas. For this reason, removing ammonia nitrogen from wastewater has become a critical indicator for ensuring water safety. Of course, different Water Quality Detectors are used for different monitoring scenarios.
Hangzhou Modi offers several instruments for ammonia nitrogen monitoring, as listed below:
1.NH3N-8000N Ammonia Nitrogen Online Analyzer
Monitoring Method: Nessler’s Reagent Method
After being filtered by an online pretreatment unit, the sample is delivered to the reaction cell. The analyzer first measures and stores the sample blank value in the reaction cell, then automatically adds various reagents in sequence, including Nessler’s reagent. After sufficient mixing, a color reaction proceeds according to the user-set reaction time, changing the color of the indicator. Within the measuring range, the degree of color change is proportional to the ammonia nitrogen concentration in the water sample. The ammonia nitrogen content is calculated by measuring the color change.
2.NH3N-8000 Ammonia Nitrogen Online Analyzer
Monitoring Method: Stripping Colorimetry
The pretreated sample is first mixed with stripping solution in a stripping bottle, which converts ammonia nitrogen in the sample into ammonia gas. Driven by a diaphragm pump, the ammonia gas is transferred to the colorimetric cell and reacts with the indicator inside, causing a color change. Within the measuring range, the degree of color change is proportional to the ammonia nitrogen concentration in the water sample. The ammonia nitrogen content is determined by measuring the color change.
3.NH3N-8000S Ammonia Nitrogen Online Analyzer
Monitoring Method: Salicylic Acid Method
After filtration by an online pretreatment unit, the sample enters the reaction cell. The analyzer first measures and stores the sample blank value, then automatically adds masking agent, salicylic acid chromogenic agent, environmental control solution and other reagents in sequence. After thorough mixing, a color reaction takes place as programmed, altering the indicator color. Within the measuring range, the degree of color change is proportional to the ammonia nitrogen concentration in the water sample. The ammonia nitrogen content is calculated based on the measured color change.
4.NH3N-8000 Ammonia Nitrogen Online Monitor
Monitoring Method: Potassium Persulfate Oxidation UV-Vis Spectrophotometry
After pretreatment, the water sample is sent to the ammonia nitrogen digestion cell, where potassium dichromate is added, followed by high-temperature and high-pressure reaction in the presence of silver and mercury salts. The ammonia nitrogen concentration is then determined via colorimetry. Meanwhile, another portion of the water sample is introduced into the colorimetric cell, and Nessler’s reagent or salicylic acid is added for ammonia nitrogen colorimetric measurement. Within the measuring range, the degree of solution color change is proportional to the ammonia nitrogen concentration in the water sample. The ammonia nitrogen content is calculated by measuring the absorbance of the solution.
