New Colorimetric Method Development And Validation Of Sulfacetamide In Bulk And Formulation By Different Analytical Reagents

Abstract

Four simple, sensitive and reproducible spectrophotometric methods (Method A, Method B, Method C and Method D) were developed for the determination of sulfacetamide (SA) and its pharmaceutical formulation. Method A was developed based on diaziatation of the SA by sodium nitrite in acidic medium followed by coupling with B.M reagent having absorption maximum at 530 nm. Method B was developed based on reaction of NQS with primary amine in SA in presence of alkaline medium having maximum absorption at 466nm. Method C was based on reaction of primary amine with MBTH in presence of FeCl3 having maximum absorption at 562nm. Method D was developed based on reduction of phosphomolybdotungstic acid in presence of alkali medium having an absorption maximum at 760 nm. Beers law was obeyed in the range of 1 to 3 g/ml for Method A, 5 to 30 g/ml for Method B, 10 to 50 g/ml for Method C, and 100 to 300 g/ml for Method D. These methods were successfully validated and estimated in bulk and pharmaceutical formulations.