Spectrophotometric determination of drug clonazepam in pure form and pharmaceutical tablets by oxidative coupling reaction with chlorpromazine hydrochloride

Abstract

Sensitive, simple and a Precise spectrophotometric methods were development for the estimation reduced clonazepam (CZP) in purity form and in the pharmaceutical tablets from through using potassium bromate as oxidizing reagent for the drug and Chlorpromazine Hydrochloride (CPZ.HCL) as new chromogenic reagent. That led to forms colored products with a maximum absorbance of 530 nm. For the conditions reaction have been studied and optimized. The linearity range for Clonazepam was 0.05–3.5 μg/ ml, while the detections limit 0.0061 and the quantification limit 0.020 μg ml-1. The Molar Absorptivity 1.381×104 L/ mol cm with Shandell's sensitivity 0.0228 μg. cm-2. Finally the proposed methods were successfully Appling for estimation CZP in pure form and commercial formulations