Water purification refers to water that does not contain any harmful substances, antibiotics, residual chlorine, heavy metals, inorganic salts, additives, and various impurities. It can effectively and safely replenish the body with water, has strong affinity with human cells, and has a role in promoting metabolism.
So, what are the "clean water indicators" for clean water?
The sensory index is simply a water quality indicator that can be directly perceived and observed, including color, turbidity, odor, and visible substances. These indicators are the most basic indicators in the quality control of pure water, and the standard values they set are based on the standard of drinking water (ie, tap water).
2. Physical and chemical indicators
The more important physical and chemical indicators are the electrical conductivity and potassium permanganate consumption.
Conductivity is a characteristic indicator of pure water, reflecting the purity of pure water and the control of the production process. The smaller the conductivity, the purer the water.
The consumption of potassium permanganate refers to the amount of oxygen consumed in 1L of water when the reducing substance is oxidized by potassium permanganate under certain conditions. It mainly examines the content of organic substances, especially chlorides, in water.
The principle of potassium permanganate consumption test is to soak the measured sample with distilled water, and all the easily dissolved organic small molecules will dissolve in water to form a mixture. When the mixture is titrated with a strong oxidizing potassium permanganate solution, all organic small molecules will be oxidized, and water will not participate in the chemical reaction. The consumption of organic potassium permanganate consumption represents the content of soluble organic substances.
3. Microbiological indicators
Microbial indicators in the national standard provides the total number of colonies, coliform bacteria, pathogenic bacteria and mold, yeast and other items. Microbial indicators in the national standard provides the total number of colonies, coliform bacteria, pathogenic bacteria and mold, yeast and other items.
For example, the total number of colonies in the water can be used to evaluate the degree of cleanliness of the water and assess the effectiveness of the decontamination; the coliform group indicates whether there is a possibility of an intestinal infectious disease in the water.
Once the microbiological indicators are unqualified, there is a risk of contracting intestinal infectious diseases when people drink directly. However, from the perspective of the detection of purified water in recent years, microbiological indicators are one of the indicators that are relatively easy to exceed the standard.
4. Radioactive indicators
The radioactive index specification value is only used as a reference level. If the radioactive index exceeds the specified value, radionuclide analysis and evaluation must be performed to determine whether the water can be consumed.
Under the current situation of water pollution, the issue of safe drinking water is more and more important, and people are paying more and more attention to the requirements for healthy drinking water. Therefore, with the concept of healthy drinking water becoming more and more popular, the water purifier gradually into millions of households.
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