alexa Simultaneous determination of Glimepiride and Metfo rmin hydrochloride impurities in sustained release pharmaceutical drug product by HPLC
Chemical Engineering

Chemical Engineering

Journal of Chromatography & Separation Techniques

Author(s): Shraddha Pawar, Gangadhar Meshram, Rajendra Jadhav, Yatish Bansal

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A gradient method is developed for the quantitative simultaneous determination of impurities of glimepiride and metformin hydrochloride in the comb ined –pharmaceutical dosage form. The method is based on high- performance liquid chromat ography (HPLC) on a reverse phase column of Waters Symmetry -C8,5μ 4.6 x 250mm thermo stated at 50 o C, using a mobile phase of Pentane sulfonic acid sodium salt buffer pH 3.5 and acetonitrile and evaluated for its ability to simultaneously establish the level of known impurit ies of glimepiride and metformin Hydrochloride active as well as unknown impurities in glimepiride and metformin hydrochloride tablets. The method shows good resolution between g limepiride sulfonamide (GS), glimepiride urethane (GU), glimepiride 3- isomer (GI), metformi n related compound A (MA), glimeiride (G),metformin hydrochloride (M) , unknown impuritie s and formulation excipients of tablets. A gradient program with UV detection at 230nm is used to quantitate all components. The developed method is validated in term of specificit y, linearity and range for GS,GU,GI, MA , M and G , accuracy using spiked levels of impurities (80% -120% of the specified limit ) , precision and ruggedness. Limit of quantitation is found to b e 1.50 μ g mL -1 for M , 0.10 μ g mL -1 for G , 0.30 μ g mL -1 for MA , 0.24μ g mL -1 for GS ,0.10 μ g mL -1 for GU and 0.22 μ g mL -1 for GI. The proposed method is successfully applied to the pharmaceutical dosage form for the determination and quantitation of known and unknown impurities in M and G tablets without any interference from the excipients.

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This article was published in Der Pharma Chemica, and referenced in Journal of Chromatography & Separation Techniques

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