The difference between pure water, purified water, ultrapure water is as follows:
1, the difficulty of the manufacturing process is different.
The production process of pure water is made through reverse osmosis, distillation and other methods.
Purified water is water by distillation, ion exchange, reverse osmosis or other suitable methods of preparation of pharmaceutical water.
Ultra-pure water is based on pure water through a series of complex purification techniques, such as photo-oxidation technology, fine treatment and polishing treatment. Such water is the general process is difficult to achieve the degree of the theory can be used to secondary reverse osmosis and then through the series of hybrid exchange resin columns for secondary reverse osmosis water treatment, but the regeneration of the exchange resin is inconvenient, the quality is difficult to ensure.
2, heavy metals, bacteria, particles and other indicators are very different.
Pure water impurity content is ppm level, and ultrapure water for ppb level, this water in addition to water molecules, there is almost no impurities, and no bacteria, viruses, chlorine dioxin and other organic matter, of course, there is no human body needs mineral trace elements, that is, almost remove all the atoms other than oxygen and hydrogen water.
3, the use of different
Pure water is mainly used in biological, chemical chemical, metallurgical, aerospace, power and other fields.
Purified water is generally used as water for medicine.
Ultra-pure water is generally used in electronics, electricity, electroplating, lighting appliances, laboratories, food, papermaking, daily chemicals, building materials, paint-making, storage batteries, laboratory, biological, pharmaceutical, petroleum, chemical, steel, glass and other fields.
4, conductivity is different.
Pure water conductivity between 2-10us/cm, purified water conductivity ≤ 0.2us/cm, ultrapure water conductivity of 0.056us/cm.
References:
Baidu_Pure_WaterBaidu_Ultra_Pure_Water
Baidu_Pure_Water