1993 Volume 9 Issue 4 Pages 455-457
Lead(II) was generated from an amalgamated lead anode in solutions containing 0.2-1M potassium nitrate and 30% ethanol with a 100% current efficiency over a wide range of current densities. Sodium oxalate reference materials, dried at 200°C for 1h, were titrated coulometrically with electrogenerated Lead(II), with a relative standard deviation of 0.012%. A sharp end point of the precipitation reaction was detected amperometrically with a dropping mercury electrode in the presence of ethanol in the electrolyte. The results were in good agreement with the certified values based on a comparison with primary standards for oxidation-reduction titrations.
