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A simple, accurate and sensitive indirect spectrophotometric method has been developed for the determination of salbutamol sulphate and mefenamic acid in pure forms and in pharmaceutical preparations (capsule, syrup, tablet). This method based on the bromination of the drug with N-bromosuccinimide in acidic medium and the unreacted oxidizing agent react with constant amount of Azur-A dye solution due to bleach their colour and measured the absorbance of the residual colour dye at 606.5 4 .cm 1doi:10.33899/edusj.2020.127113.1072 fatcat:vrqb6fvwdvc6xooimax6xvtjhy