Abstract: Up to now, all oscillopolarographic titrations have been carried out in electrolytic cells with one micro electrode and one large electrode.Oscillopolarographic titrations on two similar micro indicator electrodes were studied and it was found that many substances such as EDTAand its related compounds giving no incisions at one micro Pt-electrode showed distinct incisions on two micro Pt-elec-trodes, for example, in the presence of KCl, EDTAand its related compounds yielded distinct incisions which can be used to indicate end-points of many chelometric titrations.Th⁴⁺, In³⁺, Ga³⁺, zn²⁺, Ni²⁺, Co²⁺, Mn²⁺, Cd²⁺ and rare earths can be directly titrated with EDTA, DTPA, CyDTAand HEDTA.Many new chelometric tieration procedures were developed.