[Determination of amitriptyline hydrochloride by zero-current oscillo-potentiometric and bipotentiometric methods]

Using platinum plate coated with PVC membrane as indicator electrode, amitriptyline hydrochloride was titrated with sodium tetraphenylborate by zero-current oscillo-potentiometry titration and zero-current oscillo-bipotentiometric titration. Both methods are precise, audio-visual, simple and convenient and can be used in the determination of other medicines.