ANALYTICAL APPLICATION OF E.B.T IN SPECTRPHOTOMETRIC DETERMINATION OF ELETRIPTAN HYDROBROMIDE
A simple and sensitive spectrophotometric method has been developed for the estimation of Eletriptan Hydrobomide (EHB).The method is based on the formation ofÂ ion-associationÂ complex with EHB withÂ acid dye, E.B.T. The cationic form of the dye E.B.T involves in the formation of neutral colouredÂ ion-associationÂ complex Â with negative charge (acid groups in the drug) which is extractable into chloroform and behaves as a single unit being held together by electrostatic attraction. The absorption maxima were found to be atÂ lMax 510nm.Â The method obeys Beer's law within the limitsÂ 40-240Âµg/mlÂ and gives reproducible results. Molar absorptivity value is obtained as 1.2116 x 105Â LÂ mol-1 cm-1Â and recovery was found to be 99.806 to 99.742. Interferences of the other ingredients and excipients were not observed. The proposed method can be used for the determination of EHB both in pure and pharmaceutical formulations.
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