[Chemical Knowledge]：What is Deionized Water?

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Deionized water is pure water ions have been removed from the water, that is to say, deionized water is a specific treatment of water, water ions, minerals and other impurities are removed, leaving only the water molecules themselves. The preparation method of

deionized water
The preparation method of
deionized water is various, and different application fields have different requirements for its preparation method. The most common methods of preparation today are by ionization exchange technology (D.I.) or reverse osmosis technology. Deionized water is prepared by ionization exchange technology, ions in water are adsorbed by resin, and ion components in water are removed by repeatedly circulating resin exchange and resin regeneration until the ion content of 1‰ is below. When deionized water is prepared by reverse osmosis technology, water molecules are pressed into the filter membrane by high pressure to allow water molecules to pass through, while ions are blocked by some special technologies on the filter level, thus achieving the purpose of removing ions.

the properties of deionized water

Since deionized water is water without ions, minerals and other impurities, its properties are also different from ordinary tap water or mineral water. The pH value of deionized water is usually neutral and will not stimulate the human body; the deionized water does not contain harmful substances such as heavy metals, so it has good biological safety; the deionized water does not contain soluble substances, and it crystallizes at low temperature When it becomes ice, it will not leave any mineral residue; the deionized water will not cause pollution.

of the application fields of
deionized water
Due to the excellent properties of deionized water, its application range is also very wide. The following lists the application of deionized water in several major areas.

1.

in the electronics industry Due to the extremely high purity of raw materials required for electronic manufacturing, washing PCB (printed circuit board) with deionized water and washing electronic components such as piezoelectric crystals, capacitors, inductors, and power supplies can make the surface Clean and pollution-free, thereby improving product quality and life.

2. Pharmaceutical Industry

Natural water sources contain impurities such as minerals and bacteria that may affect drug production and body mechanisms, so the water used in the pharmaceutical industry must be pure and sterile. In the process of extraction, synthesis, precipitation and crystallization of traditional Chinese medicine commonly used in pharmaceutical manufacturing, ultra pure water without impurities is also needed.

3.

in the medical industry In medical testing, the separation and analysis of human blood, urine and other samples requires high-purity, sterile water. Therefore, deionized water is widely used in medical, biopharmaceutical and other fields.