2.4.Analysis of formulations
20 tablets of 3 totally different brands ( Istamet, Janumet, Kombiglyze) were taken and their average weight was calculated. The tablets were crumpled to a fine powder, dose equivalent to 10 mg equivalent weights of the Met, Saxa and Sita. Tablet powder into a 10 mL clean, dry volumetric flask, add diluent and sonicate to dissolve it completely and make the volume up to the mark with the same solvent (Stock solution). Further pipette 2 mL of the above stock solution into a 10 mL volumetric flask and dilute up to the mark with diluent. Inject 20 mL of the standard, sample into the chromatography system and measure the areas for the Met, Saxa and Sita peaks and calculate the percentage of the assay of the formulations