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With the country's strengthening of environmental protection, the government is formulating and promoting environmental monitoring and strengthening law enforcement, all of which are forcing enterprises to increase the scale of investment in emission reduction and pollution control. At the same time, the severe situation of food hygiene and safety has gradually become a major factor affecting the health of the whole people in recent years, and industries such as medicine, chemical industry, food and beverage, and aquaculture are also gradually strengthening water quality testing and monitoring. Not only that, the destruction of water sources and the pollution of surface water also cause people to pay attention to the safety of civil water quality (drinking, swimming, etc.). ), and water quality detectors have gradually entered everyone's life. In recent years, driven by the triple trend of national water environmental protection becoming more and more important, commercial drainage water quality being forced to be strengthened, and residents' water quality safety, especially drinking water becoming more and more important, the water quality detector market has developed rapidly. Today, let's start with the civilian drinking water scene and talk about what a good water quality monitor should look like for the current water quality testing products on the market.
Before giving the final answer, we have a preliminary understanding of water quality. Qualified drinking water standards must meet microbial indicators (number of bacteria), toxicological indicators (concentration of heavy metal plasma), sensory properties (color, smell, and visible substances) and general chemical indicators and radioactivity indicators. Healthy and clean domestic water shall not contain pathogenic microorganisms, chemical substances and radioactive substances in water shall not endanger human health, and the sensory properties shall be good. The national 'Drinking Water Sanitation Standard' GB5749-2006 stipulates that the PH should not be less than 6.5 and not more than 8.5, the total dissolved substances should not exceed 1000mg/L, and the nitrate and chloride should not exceed 250mg/L. There are also requirements for the content of other elements, and there are more than 20 kinds of index requirements.
Then, let's search for various water quality detectors on the e-commerce platform. You will find many brands and models of water quality detectors, and there are various types of testing, such as total nitrogen water quality analyzers, ammonia nitrogen detectors, COD rapid analyzers and so on. For example, Chemical Oxygen Demand (COD) is a chemical method to measure the amount of reducing substances that need to be oxidized in a water sample. Oxygen equivalent of substances (usually organic) that can be oxidized by strong oxidants in wastewater, wastewater treatment plant effluent, and contaminated water. In the study of river pollution and industrial wastewater properties and the operation and management of wastewater treatment plants, it is an important and fast-determined organic pollution parameter, which is often represented by the symbol COD.
Therefore, the quality standards of different water quality detectors are different, and there is no way to generalize. When choosing a water quality detector, we must proceed from our own actual situation and choose a trustworthy brand.
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