Optimization of the Determination Method of Terbinafine Hydrochloride by Non-aqueous Potentiometric Titration / 中国药房

ABSTRACT

OBJECTIVE: To improve the determination method of terbinafine hydrochloride by non-aqueous potentiometric titration.METHODS: Potentiometric titration was adopted to determine the content of terbinafine hydrochloride using glacial acetic acid as solvent,acetic anhydride instead of mercury acetate.Results of improved determination method were compared with that of primary method.RESULTS: One abrupt change was obtained in the titration curve.The repeatability precision RSD was lower than 0.15%.Results of improved determination method were compared with that of primary method with maximum deviation of 0.1%.CONCLUSION: Improved method not only discards mercuric salt but also obtain obvious abrupt change of titration curve.It is simple and rapid for the determination of terbinafine hydrochloride.