Abstract: Up to now, all oscillopolarographic litrations were carried out in electrolytic cells with one micro electrode and one macro electrode. Oscillopolarographic titrations on two similar micro indicator electrodes have been studied and it was found that many substances such as EDTAand its related compounds giving no incisions on one micro Pt-electrodc showed distinct incisions on two micro Pt-clectrodes. For example, in the presence of KC1, EDTAand its related compounds yielded distinct incisions which can be used to indicate end-points of many chclometric titrations. Th⁴⁺, In³⁺, Ga³⁺, Zn₂₊ , Ni₂₊, Co²⁺, Mn₂₊, Cd₂₊, and rare earths can be directly titrated with EDTA, DTPA, CYDTA, and HEDTA. Many new chelomctric titration procedures were developed.