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IntroductionDeionized (DI) water is water that has been treated to remove all ions – typically, that means all of the dissolved mineral salts. Distilled water has been boiled so that it evaporates and then re-condensed, leaving most impurities behind.Distillation is one of the oldest methods for creating pure water. Filtered water is heated until it has evaporated, turning into steam. This steam is collected in a sterile container, where it condenses and becomes water again. Because water has a …