Simultaneous determination of dopamine, uric acid and ascorbic acid at an ultrathin film modified gold electrode

Well-separated square wave voltammetric peaks for uric acid, dopamine and ascorbic acid were observed at an ultrathin polypyrrole–tetradecyl sulfate film modified gold electrode, which can be used for simultaneous determination of these species in the range of 1 to 500 µM with good reproducibility.