FACILE HPLC/UV METHOD FOR DETERMINATION OF METFORMIN AND 1-CYANOGUANIDINE USING NOVEL HALOGENATED STATIONARY PHASE

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Abstract

Metformin is the most prescribed drug for diabetes. We aimed to develop a new HPLC method for determination of metformin and its main impurity 1-cyanoguanidine in raw material and its pharmaceutical tablets. The separation was achieved on pentabromobenzyl column using a mixture of 20% 10.0 mM phosphate buffer (pH 5.5) and 80% methanol as a mobile phase at a flow rate of 1.0 mL min-1 and UV detection at 227 nm. The analysis time was less than 4.0 minutes. The method was linear through concentration ranges of 3.0 -80 µg mL-1 and 0.5-10 µg mL-1 and detection limits of 0.73 µg mL-1 and 0.11 µg mL-1 for metformin and 1-cyanoguanidine, respectively. The method was successfully applied for determination of metformin in bulk and pharmaceutical dosage forms. The high sensitivity of the developed method allowed for determination of 1-cyanoguanidine below its specified limits in metformin raw material and tablets.

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APA

Abdel-Hakim, A., Shallan, A. I., Hammad, M. A., & Abou El- Alamin, M. M. (2022). FACILE HPLC/UV METHOD FOR DETERMINATION OF METFORMIN AND 1-CYANOGUANIDINE USING NOVEL HALOGENATED STATIONARY PHASE. Bulletin of Pharmaceutical Sciences. Assiut, 45(1), 223–231. https://doi.org/10.21608/bfsa.2022.239443

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