The rapid development of deionized water equipment technology
The progress of science and technology and the rapid development of industry and agriculture have promoted the civilization and modernization of human life. At the same time, it has also increased the pollution of water, food and air by toxic and harmful substances, especially chemical substances. More than 2000 categories of chemical contaminants have been found in water. (Deionized water equipment) Hundreds of contaminants have been identified in drinking water, most of which are organic compounds. However, it is not possible to establish standard limits for every compound identified in drinking water. This is not only because there is not enough scientific information to develop so many standards, but also because there is no need. A certain number of indicators should be selected to determine the standard limit from the actual situation. The basis for selecting water quality indicators includes the following.
(1) It can cause obvious adverse effects on water quality. There are many contaminants in drinking water. (Deionized water equipment) Some of them have little effect on water quality, do not affect the sensory properties of water, and have low toxicity; for such substances, it is not necessary to determine the limit value. However, it is necessary to establish limit values for those substances that can obviously affect the appearance, color, odor or taste of water, as well as substances that are highly toxic and harmful, in order to ensure the safety of drinking water and good water quality.
(2) There is sufficient scientific basis for setting limits. The formulation of standard limits is based on on-site investigations and scientific research data. Limits cannot be established, even if they are objectively required, if the scientific basis is insufficient.
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