Electrochemical selective determination of dopamine at TX-100 modified carbon paste electrode: A voltammetric study

► An electropolymerized film of naphthol green B (NGB) was developed on the carbon paste electrode and studied in detail. ► The poly (naphthol green B)-film modified CPE was applied for the determination of DA in presence of UA. ► The modified electrode was successfully used for the determination of DA and UA in pharmaceutical and urine samples.