Abstract: This paper presents a method in which charging current is taken off from ACoscillopolaro-graphy. Some Instrumental devices controlled by micro computer were designed. With these devices we determined the i₁～E and i_p～C curves of T1⁺, In³⁺, Cd²⁺, Pb²⁺, Zn²⁺ions. Where i_fis the faradic current, i_pis the peak current and Cis the concentration of depolarizer. The determining sensitivity of ACoscillopolarography was improved.

Key words: AC oscillopolarography, Faradic current, Computerized oscillopolarographic instrument