Abstract: Zero-current oscillographic potentiometric neutralization titration on two indicator electrodes was studied. Any combination of two electrodes from Hg(Ag), Pt (anodized in 0.1mol/dm³ H₂SO₄ at 1.5V vs. S C E), Sb and W(soaked in distilled water) can be used for 0. 1~0.01mol/dm³ acid-base titrat-ions. For more dilute acid or base solutions, one can use an anodized electrode and an unanodized one. Polyacid can also be titrated. Compared with other methods,this method is simple, accurate, intuitive, rapid and sensitive. The effect of Cl^- on Hg(Ag), Pt electrodes during the titration is also discussed.

Key words: Oscillographic titration, Neutralization titration on metal electrodes Oscillographic bipotentiometric titration