M ODIFED carbon paste electrodes and screen printed electrodes were developed for the potentiometric determination of butenaFne hydrochloride (BTFHC) in urine, serum and pharmaceutical preparations.Two modiFed carbon paste electrodes (electrodes A and C) and two modiFed screen printed electrodes (electrodes B and D) using tricresylphosphate (TCP) and o-nitrophenyloctyl ether (o-NPOE) plasticizers,...