chlorpromazine , determination, 2,2`-bipyridyl, spectrophotometry
Abstract
This paper describes the development of a spectrophotometric method for the determination of chlorpromazine hydrochloride drug via oxidation reduction method which based on the reduction of iron (III) by the chlorpromazine hydrochloride to iron(II) which gives a soluble colored complex when reacts with the reagent 2,2`-bipyridyl at room temperature having maximum absorption at 521 nm against reagent blank. Beer´s law was obeyed over the concentration range of 2.5 to 300 µg/25 ml with an apparent molar absorptivity of 1.054 x 104 l.mol-1cm-1 and Sandell`s sensitivity of 0.033 µg.cm-2. The relative error is ranged from -0.1 to -1.66% and relative standard deviation from ±0.2 to ±1.37% . The method has been applied successfully to the determination of chlorpromazine hydrochloride in two dosage forms : tablets and ampoules. Additives and excipients normally found in dosage forms do not interfere
Keywords
Spectrophotometric Determination of Chlorpromazine Hydrochloride Using Oxidation Reduction Method based on Reaction of Iron, II with 2, 2`-Bipyridyl ReagentMetrics