The Manufacturing And The Various Functions Of Deionized Water

Published: 18th March 2010
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Deionized water is a popular term for a certain type of pure water used for industrial and laboratory purposes. It may be spelled as de-ionized water and shortened to DI water. It is compared to distilled water or demineralized water. Distilled water is another kind of pure water that only undergoes a different process. Demineralized water and DI water are basically similar, both of which contain negligible amount of ions or minerals, making them ideal for stringent scientific use, in which the use of plain water may produce undesirable effects. Plain or tap water contains a lot of impurities.

A typical deionized water manufacturer produces this type of water by running filtered/disinfected water over a resin bed, where ion exhancge occurs. In this ion exchange process, the resins take away the positive ions and replace them with hydrogen ions. For instance, sodium (Na+), calcium (Ca++), and iron (Fe+++) become replaced with (H+) ions. During the next step, the negative ions such as chloride (Cl-) and bromide (Br-) and carbonates become replaced with hydroxyl ions (OH-). The result is ultra pure water devoid of ions. Depending on the equipment and necessity, the process may be repeated a few times until the result has negligible levels of conductivity and high levels of electrical resistance.

After the production of DI water, it is important that the quality is maintained otherwise the entire process of purification is lost to mishandling. A part of this is ensuring contamination never occurs. This can be made possible by making sure the environment is free of dust, particles and gases. Storage must be done immediately and the storage vessel or container should be made of the recommended glass or tin-plated material otherwise the possibility of leaching is high.

Experts point out that DI water may not necessarily be the purest form of water. Depending on industrial purpose, water may only be deionized without passing through stringent purification procedure. This kind of liquid may be used in applications which do not care much about the sterile quality of water. Hence, some DI water may contain an appreciable amount of organics like bacteria, viruses, organic substances, and organic particulates. Ultra pure water, that is deionized, is manufactured for scientific purposes such use in microbiology labs, chemical analysis experiments, tissue culture, hospital settings, autoclaves, and even in homes for drinking. Experts point out that it may not be advisable to drink it, unless it is carefully made for drinking purposes.

The use of water that has no ions is diverse. You find it in pharmaceuticals, wherein the preparation of various types of drugs utilizes pure water. You also find it in cosmetics and even cleaning solutions which uses pure DI water otherwise the chemical nature of the products could be affected. Supplies of deionized water are distributed to different industries, indeed.

Jo is a writer for '' (, an established UK based high quality water supplier for over thirty years, supplying products such as deionized water and demineralized water to a an extensive range of customers in UK, Europe and all over the world. If your business has a deionized water source requirement or if you would like to know more details on the various water products then check out

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