DEVELOPMENT OF NEW VISIBLE SPECTROPHOTOMETRIC METHODS FOR DETERMINATION OF BENIDIPINE HYDROCHLORIDE IN BULK AND FORMULATIONS BASED ON OXIDATIVE COUPLING AND DIAZO COUPLING REACTIONS

摘要

Three simple and sensitive visible spectrophotometric methods (A-C) have been developed for the estimation of Benidipine hydrochloride [BEN] from its bulk drug and dosage forms. The proposed methods are based on the reduction of the nitro group to amino g