Water resulting from the removal of contaminants in the water by a double-bed ion exchanger. The ion exchanger switches H+ (hydrogen) ions for positive impurity ions and OH- (hydroxide) ions for negative impurity ions. The H+ ions and OH- ions then combine to form HOH (H O). Deionized water is equivalent in purity to distilled water but is much less costly to produce.
(4) chemically or electrochemically purified water used in chemical analysis to avoid contamination of the materials being tested.
Water that has been propelled through active resin beds to remove metallic ions, exposed to ultraviolet light to kill micro-organisms and filtered through a submicron filter to further remove impurities.
Water from which the ionic impurities have been removed by passing it through anion and cation exchange columns.
Water resulting from the removal of contaminants by a double-bed ion exchanger. The ion exchanger replaces positive impurity ions with H+ (hydrogen) ions and negative impurity ions and OH-(hydroxide) ions. The hydrogen ions and hydroxide ions then combine to form H0H (H20). Deionized water is comparable in purity to distilled water but is much less costly to produce.
water that has been filtered and treated to remove metallic ions, kill microorganisms, and remove impurities.
Water from which both anions and cations have been removed by the ion exchange process. Only substances that ionize in water are removed in this process. Deionized water is generally considered to be higher quality than distilled.
Water which has been freed of ions by treatment with ion exchange resins.
Prepared by passing feedwater through a mixed-bed ion exchanger, consisting of strong anion and strong cation resins mixed together. The resultant water shall have the same characteristics as those for distilled water noted above.
water processed and filtered to remove impurities.
Water that goes through an ion exchange process in which all positive and negative ions are removed.
Water free of inorganic materials.
water free of inorganic chemicals.
Water containing no ions. (Usually produced through the use of ion exchange resins.)
Water from which charged or ionizable organic or inorganic salts are removed.
Water that is free of all ions, including calcium, sodium, chloride, and all others.
Water which has been purified to remove mineral salts.
Water that has had all of its charged particles (ions), other than hydrogen and hydroxide ions, removed.
Water purified by deionization technique based on removal of highly active ions especially positively charged cations like calcium (Ca++) magnesium(MG++) and iron (Fe++) and (Fe+++).
Water that has had a majority of its ions removed. DI water can be aggressive and cause corrosion on mild steel, aluminum, copper, brass and many other less resistant metals. Stainless steel has better resistance to DI water corrosion.
water from which the majority of ions have been removed. Tap water has resistivity of 50 kiloohms, deionized water may have resistivity as 18 megaohms. The term deionized water has been largely replaced by ultrapure water to indicate that more than just low ions counts are required.
Water that has had the ions removed. Used in laboratories for making reagents.
Deionized water (DI water or de-ionized water; also spelled deionised water, see spelling differences) is water that lacks ions, such as cations from sodium, calcium, iron, copper and anions such as chloride and bromide. This means it has been purified from all other ions except H3O+ and OH−, but it may still contain other non-ionic types of impurities such as organic compounds. This type of water is produced using an ion exchange process.