A carbon paste electrode (CPE) modified with poly (tannic acid) was used for the sensitive voltammetric determination of dopamine (DA) and epinephrine (EP). The electrochemical response characteristics of the modified electrode towards determination of EP and DA were investigated by cyclic voltammetric technique (CV). The effect of pH, concentration and potential sweep rate on the mechanism of the electrode process was investigated. The modified electrode exhibits an efficient electron mediating behavior for DA and EP. The modified electrode showed high sensitivity, detection limit, high reproducibility, easy preparation and regeneration of the electrode surface.
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Manjunatha et al. (2010) studied this question.
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