An overview of methods for determination of complex formation constants ofmetal-resin chelates

The paper deals with different processes and methods allowing the determina tion of formation constants of different metal-resin chelate complexes. It discusses the methods based on ligand competition, metal competition, proto n competition and on the pH dependent complex decomposing step. The applica bility of the methods was proved doing experiments with potassium(I), coppe r(Ir), nickel(II), cadmium(II), zinc(II), calcium(II), strontium(II) and ma gnesium(II) ions and Ligandex-E (ethylenediamine triacetate) resin and with the subsequent calculations. The obtained formation constant values are co mpared and the advantages and disadvantages of the individual methods are d iscussed. The well-known Bjerrum method was also used and its capability di scussed.