Mixed-bed Ion Exchangers

EMD Millipore’s mixed-bed ion exchangers are a combination of strongly acidic cation exchangers and strongly basic anion exchangers. They include a convenient color indicator, which is characteristic for strongly basic anion exchangers. When loaded, the color indicator of Amberlite MB-3 changes from blue to brown. Transfer into the Na⁺/Cl^- form can be successfully achieved using 10% sodium chloride solution. However, regeneration of mixed-bed ion exchangers back to the H⁺/OH^-form is not possible under laboratory scale conditions.