Abstract
The present study describes employing second derivative spectrophotometry for simultaneous determination of atenolol and amlodipine in pure form and in commercial formulations. The method is simple, accurate, precise and economic. Zero crossing point technique was used for analysis of the drugs in the combined formulation. The method was found to be linear in the concentration range 5.0-50.0µg/ml of atenolol at 251nm and 5.0-45.0µg/ml of amlodipine at 264nm. The proposed method was successfully applied to determine atenolol and amlodipine in combined dosage as well as in a separate dosage. The obtained results were in good agreement with standard method.
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