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The electrochemical oxidation of 1-methyluric acid was studied at a pyrolytic graphite electrode (PGE) in the pH range 2.1–10.0. One well-defined, 2e, 2H + , pH-dependent oxidation peak was observed in linear and cyclic sweep voltammetry. The decay of the UV-absorbing intermediate and the pseudo-first-order rate constants were calculated at different pH values and at different ionic strengths...