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The detection principle of the residual chlorine detector in water

by:BOQU     2023-03-24
Residual chlorine refers to the remaining total amount of chlorine (active chlorine, hypochlorous acid and organic chloride) after the chlorine preparation is added to the treated water and reacts with the reducing substances in it; Depends on the residual chlorine concentration. In the water supply and drainage industry, residual chlorine is an important parameter for judging the quality of water, and it is also one of the indicators that often need to be measured for water quality monitoring. The main source of free chlorine (residual chlorine) in water is adding chlorine to drinking water or sewage to kill or inhibit microorganisms; adding chlorine to electroplating wastewater to decompose highly toxic cyanide, adding chlorine to printing and dyeing, wood, paper and other industries bleach. However, chlorine gas is also a toxic substance. When the concentration of chlorine gas is too high, it can cause damage to the skin, mucous membranes, respiratory tract and other organs of the human body, and even endanger life. Therefore, urban water supply, swimming pool water, etc. must strictly control the concentration of residual chlorine in order to achieve the purpose of disinfection and sterilization without endangering human health. The residual chlorine detector in water can quickly detect the content of total chlorine (chlorine dioxide, residual chlorine) in water quality. The residual chlorine detector in water has the characteristics of fast detection speed, many detection items, high accuracy, supply of finished pharmaceutical products, and easy to learn; it can be widely used in sewage detection in water plants, food, chemical, metallurgy, environmental protection and pharmaceutical industries. Commonly used laboratory instruments. Detection principle The residual chlorine in the water is extracted and reacts with the detection reagent to form a colored compound. The absorbance is measured at 550nm by a detector, and the absorbance is proportional to its content within a certain range.
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