A " strong " ion exchanger will not lose the charge on its matrix once the column is equilibrated and so a wide range of pH buffers can be used . " Weak " ion exchangers have a range of pH values in which they will maintain their charge.
22.
A typical example of application is preparation of high purity water for power engineering, electronic and nuclear industries; i . e . polymeric or mineralic insoluble "'ion exchangers "'are widely used for water softening, water purification, water decontamination, etc.
23.
The selectivity coefficient, the equivalent to the equilibrium constant, is determined via a ratio of the concentrations between the resin and each ion, however, the general trend is that ion exchangers prefer binding to the ion with a higher charge, smaller hydrated radius, and higher polarizability, or the ability for the electron cloud of an ion to be disrupted by other charges.
