How about detecting residual chlorine in water during the 2019-nCoV period?
Residual chlorine refers to the amount of chlorine that is consumed by bacteria, microorganisms, organics, and inorganic substances in the water after it is put into water. This amount of chlorine is called residual chlorine, also known as free chlorine. . Total residual chlorine is the sum of combined residual chlorine and free residual chlorine. Combined residual chlorine (referring to the compounds of chlorine and ammonia in water, there are NH2Cl, NHCl2 and NHCl3); free residual chlorine (referring to OCl +, HOCl, Cl2, etc. in water) We usually refer to free chlorine as free chlorine.
At present, public places and households often use chlorine-containing disinfectants for disinfection prevention and control. On the one hand, it is necessary to ensure sufficient concentration of disinfectant to ensure the disinfection effect; on the other hand, the residual chlorine discharged into the urban sewage treatment plant may be partial High, affecting the normal operation of the biochemical processing unit. At the same time, too high residual chlorine may affect surface water, groundwater and drinking water sources, and affect the ecological environment and drinking water sources.
Therefore, the determination of the residual chlorine content and the state of existence in the water is extremely important for the disinfection effect, the quality of the environmental water quality and the safety of drinking water.