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DI Water Purified_water

Deionized water or DI water Deionized water is deeply demineralized, ultrapure water with the resistivity close to 18 megohm-cm. It is used in microelectronics, printed circuit boards, instrument manufacture, pharmacy, washing liquids, etc. You can compare the deionized water vs distilled water, but to say that the distilled water is the same as deionized water is a mistake. Similarities and differences: deionized water vs distilled water vs reverse osmosis water -> Deionized water vs distilled water – DI water is as pure as the distilled water or even purer; -> Reverse osmosis water vs distilled water – RO water is more saturated with salts and oxygen than the distilled water and DI water; -> Reverse osmosis and deionization are a more cost-effective than the distillation.

Distillation is used mainly in laboratories and factories, where it is needed. Reverse osmosis is widely used in water treatment plants, both at home and for manufacture of various drinks, bottled water, etc.

Distillation, RO and deionization processes are intended to purify the water of the contaminants: mercury, lead, strontium, nitrates, phosphates, manganese, as well pesticides. http://www.waterandmorehub.com/deionized-water-vs-distilled-water/

How does ion exchange work? Ion exchange resins are used to produce deionized water (demineralized water or "DI Water"). These resins are small plastic beads that are composed of organic polymer chains that have charged functional groups built into the resin bead. Each functional group has either a fixed positive or negative charge. http://puretecwater.com/deionized-water/what-is-deionized-water