A method already discovered at the end of the 19th century, in which ions (Greek ion = migratory) - that is, particles such as atoms or molecules - are exchanged between two substances with the help of so-called ion exchangers. Such ion exchangers are high molecular weight substances such as silicate minerals (zeolites) or synthetically produced resins which are able to release their own ions (without breaking up) and to absorb other solutions in solution. This is used for example for water softening by Calcium- and magnesium Ions from the water and against sodium Ion (the ion exchanger) exchanges. A special form is the ion exchange chromatography,
An ion exchange is at the winemaking for stabilization (removal of Weinstein ), in the filtration, For leavening or deacidification as well as for the production of RTK (rectified concentrated grape must). Mostly this is combined with osmosis (Reverse osmosis) practiced. An application in this regard can but the taste or that Aroma of the wine. The method was therefore according to EU Regulation is prohibited and is only allowed in exceptional cases with specific requirements.
Complete listings of the numerous vinification measures and cellar techniques, as well as the wine-regulated wine, sparkling wine and distillate types are under the keyword winemaking contain. Comprehensive information on wine law is available under the keyword wine law,