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A simple and accurate liquid chromatographic method has been developed and validated for the determination of either canagliflozin, dapagliflozin propandiol monohydrate or empagliflozin and metformin in presence of metformin major degradation product;1-cyanoguanidine. The Liquid Chromatographic (LC) method was based on isocratic elution on Prontosil (Lichrosorb 100-5-NH 2 ) column using a mobile phase consisting of NaH 2 PO 4  buffer (10 mM, pH 2.8):acetonitrile (18.5:81.5, v/v), at a flow rate of 2 mL/min −1 . Quantitation was achieved with UV detection at 225 nm. The validation of the method was assessed according to International Conference on Harmonization (ICH) guidelines. Linearity, accuracy and precision were satisfactory over the concentration ranges of 12.5–100, 3.75–30, 0.3075–2.46, and 0.3125–2.5 μg/mL for metformin HCl, canagliflozin, dapagliflozin propandiol monohydrate and empagliflozin, respectively. Limits of detection and quantitation were found to be 0.068, 0.135, 0.077 and 0.069 μg/mL and 0.206, 0.410, 0.233 and 0.210 μg/mL for metformin HCl, canagliflozin, dapagliflozin propandiol monohydrate and empagliflozin, respectively. The developed method is suitable for the quality control and routine analysis of the cited drugs separately or in combinations.

journal of chromatographic science

Validated Liquid Chromatographic Method for the Determination of (Canagliflozin, Dapagliflozin or Empagliflozin) and Metformin in the Presence of (1-Cyanoguanidine)