Analyze the use of environmental problems of ammonia nitrogen rapid detector

Ammonia nitrogen rapid detector is a new type of environmental protection special analytical instrument with ammonia nitrogen determination. The planning of the ammonia nitrogen analyzer meets the requirements of the standard. It can be widely used in the rapid determination of ammonia nitrogen in surface water, groundwater, industrial wastewater, and daily sewage. It is a special analytical instrument necessary for laboratory water quality testing and monitoring. The ammonia nitrogen analyzer can be widely used It is used in environmental monitoring, sewage discharge monitoring, production monitoring, medical and health, clinical inspection, petrochemical, metallurgy, and electric power.

Ammonia nitrogen refers to nitrogen that exists in the form of free ammonia or ammonium ions. Ammonia nitrogen is a nutrient in water bodies, which can lead to eutrophication of water quality. It is the main oxygen-consuming pollutant in water bodies and is toxic to fish and certain aquatic organisms. The ammonia nitrogen analyzer reacts with free ammonia or ammonium ions to form a reddish-brown complex. The absorbance of the complex is proportional to the content of ammonia nitrogen. The absorbance is measured at a wavelength of 420nm.

Environmental problems of using ammonia nitrogen rapid detector:

1. Laboratory environment

In the laboratory where the ammonia nitrogen analyzer experiment is carried out, there should be no dust, ammonium salt compounds, and no analysis items such as nitrate-nitrogen should be carried out at the same time. Because it is necessary to use ammonia in the nitrate-nitrogen test, and the volatility of ammonia Very strong, Nessler's reagent absorbs the ammonia in the air, resulting in high test results. The reagents and glassware used in the experiment of the ammonia nitrogen analyzer should be stored separately to avoid interspersed pollution and affect the vacancy value.

2. The experimental process of the ammonia nitrogen rapid detector has high requirements for water. Ordinary distilled water often fails to meet the implementation requirements and requires secondary processing to obtain ammonia-free water. According to practical work experience, when using distillation to prepare ammonia-free water, the first part of the distillate and the latter part of the distillate should be discarded, and only the middle part of the distillate should be stored in a sealed glass bottle. The prepared ammonia-free water is empty. The value is low, but the secondary processing to produce ammonia-free water is time-consuming, laborious, and uneconomical. Using composite resin exchange column to prepare novel deionized water instead of ammonia-free water for the determination of ammonia nitrogen, the vacant absorbance can meet the implementation requirements.