Commonly known as deionization, it can also be referred to as demineralization or ion exchange.
By using synthetic resins the ions are removed from feed water.
Divided into two classifications: Cation removal resins and anion removal resins, these resins have an affinity for dissolved inorganics and their compounds.
The only technology that produces the resistivity requirement for Type I reagent grade water is deionaztion.
Primer: Lab Water Purification Technologies