Pulse coulometric titration in continuous flow

Abstract

A method is proposed for conducting a coulometric titration in a continuous flow of solution containing the analyte and the reagents for titrant generation where the titrant is generated in rectangular impulses of definite duration and different current magnitude. Coulometric titration was applied to redox titration reaction with Fe^II obtained electrochemically from Fe^III solution and solutions of K₂Cr₂O₇, KMnO₄, Ce(SO₄)₂ and NH₄VO₃ were measured in the concentration range 1 × 10^–4–1 × 10^–2 equiv. 1^–1, with relative standard deviations from 6.4 to 1.6%.