SPECTROPHOTOMETRIC METHOD FOR QUANTITATIVE DETERMINATION OF ADRENALINE IN PHARMACEUTICAL DOSAGE FORM USING METHYLTHIAZOLYLDIPHENYLTETRAZOLIUM- BROMIDE (MTT)

Abstract

A sensitive and simple spectrophotometric method is developed for thedetermination of adrenaline. The method is based on the reaction of adrenaline withmethylthiazolyldiphenyl- tetrazolium- bromide (MTT) in basic medium and the increaseof reagent's color intensity is measured at 536 nm against reagent blank. Beers law wasvalid over the concentration range of 0.1 – 3.0μg.ml-1 with molar absorptivity of 1.179 ×105l.mol-1.cm-1, and Sandell sensitivity of 0.00156 μg. cm-2. The relative error is less than+ 3%, and the relative standard deviation of better than + 1.8% depending on theconcentration. The proposed method was successfully applied to the assay of theadrenaline in dosage form.