STABILITY INDICATING RP-HPLC METHOD DEVELOPMENT AND VALIDATION FOR THE SIMULTANEOUS DETERMINATION OF VILDAGLIPTIN AND METFORMIN IN PHARMACEUTICAL DOSAGE FORM
Keywords:Metformin, Method validation, RP-HPLC, Stability indicating method, Vildagliptin
Objective: The present study was aimed to develop a rapid, accurate, linear, sensitive and validate stability-indicating high performance liquid chromatographic [RP-HPLC] method for determination of vildagliptin and metformin in pharmaceutical dosage form.
Methods: The chromatographic separation was performed on kromasil-C18 column [4.5 x 250 mm; 5 Âµm] using a mobile phase consisting of 0.05 mmol potassium dihydrogen phosphate buffer: acetonitrile [80:20 v/v], [pH adjusted to 3.5 using orthophosphoric acid]. The flow rate is 0.9 ml/min and the detection was carried out at 263 nm.
Results: The chromatographic condition, the peak retention time of metformin and vildagliptin were found to be 2.215 min and 2.600 min respectively. Stress testing was performed in accordance with an international conference on harmonization [ICH] Q1A R2 guidelines. The method was validated as per ICH Q2 R1 guidelines. The calibration curve was found to be linear in the concentration range of 5-17.5 Âµg/ml and 50-175 Âµg/ml for vildagliptin and metformin. The limit of detection and quantification was found to be 0.0182 Âµg/ml and 0.0553 Âµg/ml for vildagliptin and 0.4451 Âµg/ml and 1.3490 Âµg/ml for metformin respectively.
Conclusion: A new sensitive, simple and stability indicating reverse-phase high-performance liquid chromatography [RP-HPLC] method has been developed and validated for the determination of vildagliptin and metformin. The proposed method can be used for routine determination of vildagliptin and metformin.
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