Abstract
Oscillographic polarography is classiied into two types of Heyrovsky-Forejt's current control system and and lesmSevcik's potential control ryst.e n. These oscillographic polarographic methods have the merit of measuring the laradalc current under the steep concentration gradient of the depolarizer at the vicinity of the electrode surface, But the unfavorable overlapping of capacity current on faradaic current is pronounced as the potential or current scans more rapidly, and accordingly the selective and precise measurement of faradaic current become snore complicated. The authors employed Barker's square wave r: ethod coupled withh the modlised Randles-Sevcik's single wave polarograph, is presented inn detail, inch din, improvement on the elimanation of capacity current and the method of scanning of DC applied potential.
