DEVELOPMENT AND VALIDATION OF FIRST ORDER DERIVATIVE SPECTROPHOTOMETRIC METHOD FOR SIMULTANEOUS ESTIMATION OF PREGABALIN, METHYCOBAMIN, AND ALPHA LIPOIC ACID IN MULTICOMPONENT DOSAGE FORM
AbstractObjective: To develop and validate a novel and easy first order derivative spectroscopic method for the simultaneous determination of multicomponent dosage form which contains Methylcobalmine, Alpha lipoic acid and Pregabaline. Method: Measurement was achieved by selecting different Zero crossing points i.e ZCP for Methylcobalamine and Alpha lipoic acid at 436.24 nm, ZCP for Alpha lipoic acid and Pregabalin at 338.0 nm and ZCP for Pregabalin and Methylcobalmin at 307.03 nm. The method was validated according to ICH guideline. The proposed method was applied for quantification of all three drugs in the marketed formulations. Results: The method was found linear in the range of 100-140µg/ml for Pregabalin,1-1.4µg/ml for Methylcobalmine and 130-170µg/ml for Alpha lipoic acid respectively. The co-efficient co-relation was found to be 99.5 % for Pregabalin, 99.56 for Methylcobalmine and 99.61 for Alpha lipoic acid. The accuracy and precision were within acceptable limits. Conclusion: The method is simple, accurate, precise, rapid and cheap. The proposed method can be used for analysis of multicomponent marketed formulation