2, the preparation method is different, the preparation of ultrapure water distillation method, and anion and cation exchange resin to absorb the solution of anions and cations, and the production of deionized water is to use ion exchange resin to remove ionic impurities in the water.
3, the use is not the same, deionized water is generally used as a laboratory or laboratory water, while the use of ultrapure water in a wider range of uses, such as in electronics, electricity, electroplating, lighting appliances, laboratories, food, paper, chemicals, building materials, paint, storage batteries, laboratory, biological, pharmaceutical, petroleum, chemical industry, iron and steel, glass, chemical process water, chemicals, cosmetics and so on.