The glassy carbon electrode coated with electropolymerized methyl-red film, 1.2 x 10(-6) m in thickness, (PMRE) showed high sensitivity towards Hg(II) ions. PMREs were adopted to accumulate and detect H(II) ions in a pH 2.56 Britton-Robinson buffer solution. Cyclic voltammogram of the accumulated Hg species on PMREs exhibited an anodic wave at 0.64 V and a cathodic wave at 0.13 V, due to the oxidation of accumulated Hg species on PMREs and the reduction of Hg(II) ions in the solution, respectively. For this heterogeneous adsorption of Hg(11) ions onto PMREs, the maximum surface concentration, ...
