Purified water

Referred Demineralized water, also known as deionized water, deionized water (DI water) or deionized water, is water ( H2O) which occur in the normal source and tap water minerals (salts, ions). It is mainly used in industrial applications as a fuel for use ( for example as a heat carrier in the coolant circuit of a power plant ), but solvents and sometimes used in the chemistry and biology as well as a cleaning agent. Certain procedures or applications require so-called ultra-pure water, where specific and high specifications for the purity must be maintained.

Demineralized water obtained by ion exchange of water. Another method is the extraction of hot water by upstream reverse osmosis desalination with a subsequent rest over a mixed bed filter. As raw water is also used for smaller quantities of tap water and in larger quantities for industrial use surface or well water. It comes when it was additionally sterilized as distillate water in the same trade.

To determine the degree of purity of demineralized water, the electrical conductivity is measured with Leitwertmessgeräten. The conductivity is given in S / m (Siemens per meter). Because demineralized water has a very low conductivity, is the common unit mS / m and in the technical jargon ĩS / cm.