The use of a rotating lead-disk electrode for electroanalytical purposes

The behavior of lead as an electrode material for electroanalytical purposes was studied in 1.0 M sulfuric acid. The useful negative range of potential was approximately -0.57 to -1.20 V vs. SCE for conventional voltammetry at a rotating disk electrode. For the sinusoidal hydrodynamic modulation technique, the negative limit was about -1.25 V. Studies of the reduction of cadmium ion, thallium(I) ion, and p-nitroaniline showed that the behavior of a rotating lead-disk electrode was comparable to that expected on the basis of theory. Limits of detection are in the micromolar range.