Sodium do-decyl benzene sulfate modified carbon paste electrode as an electrochemical sensor for the simultaneous analysis of dopamine, ascorbic acid and uric acid: A voltammetric study

► An anionic surfactant Sodium do-decyl benzene sulphate was used for the modification of bare carbon paste electrode. ► The modified electrode was employed for the analysis of dopamine at physiological pH. At the modified electrode the oxidation over potentials of DA, UA and AA decrease significantly. ► DPV and CV were used for the simultaneous determination of UA, DA and AA in their ternary mixture. ► The fabricated electrode was applied to the determination of DA in dopamine hydrochloride injection sample.