Development of colorimetric method for cephalexin in dosage forms

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P Priyanka
P Suresh1


Asimple, sensitive, accurate, rapid, and economical colorimetric-spectrophotometric method has been developed for the estimation of cephalexin in capsules. This method is based on the reaction of the drug with ferric chloride and potassium ferricyanide, giving a green-colored chromogen exhibiting maximum absorbance at 791 nm against reagent blank. Beer’s law was obeyed in the concentration range of 1-6 μg/ml. Results of the analysis were validated statistically
and by recovery studies.


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Priyanka, P., & Suresh1, P. (2014). Development of colorimetric method for cephalexin in dosage forms. Asian Journal of Pharmaceutics (AJP), 2(2).


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