Demineralisoitu

Demineralisoitu water, or demineralized water, is water from which most inorganic mineral ions have been removed. The process yields very low concentrations of dissolved salts, including cations such as calcium and magnesium and anions such as chloride, sulfate, and bicarbonate. The resulting water has high resistivity and very low electrical conductivity, characteristics that make it useful in technical and laboratory settings.

Demineralisoitu water is produced by several methods. Ion-exchange treatment replaces mineral ions with hydrogen and hydroxide ions that combine to form pure water. Reverse osmosis removes most dissolved ions and often is followed by deionization to polishing. Distillation can concentrate and then re-condense water free of most minerals. Electrodialysis and other membrane processes provide alternative routes. Pre-treatment to remove particulates and organic matter is common to protect downstream equipment and improve purity.

Quality and handling considerations vary by application, but demineralisoitu water generally has very low TDS and high resistivity. Because it lacks buffering minerals, its pH can drift with exposure to carbon dioxide and it can be more aggressive toward certain materials, potentially leaching ions from containers or piping if not stored and handled properly. Therefore, it is typically stored in clean, non-reactive containers and used promptly in many high-purity processes.

Applications are widespread in laboratories, pharmaceuticals, electronics manufacturing, and industrial processes requiring minimal ionic content. Common uses include preparation of analytical reagents and buffers, solvent for chromatography or HPLC, wafer cleaning and other electronics fabrication steps, and boiler or cooling system makeup where mineral scaling must be avoided. Demineralisoitu water is not intended for drinking.