Resumen de Simultaneous estimation of moxifloxacin hydrochloride and dexamethasone sodium phosphate in bulk and in ophthalmic solution by rp- hplc
D. M Dhumal, Atul A. Shirkhedkar, P. P Nerkar, Sanjay J. Surana
A new simple, precise, accurate and selective RP-HPLC method has been developed and validated for simultaneous estimation of Moxifloxacin Hydrochloride (MOX) and Dexamethasone Sodium Phosphate (DSP) in Ophthalmic Solution. The method was carried out on a Qualisil RP C-8 (250 mm x 4.6 mm, 5 µm) column with a mobile phase consisting of Methanol: Water (75:25 v/v) pH adjusted to 3.0 with ortho-phosphoric acid of aqueous phase and flow rate of 1.0 mL min¹. Detection was carried out at 240 nm. The retention time for MOX and DSP was found to be 2.22, and 7.26 min, respectively. The MOX and DSP followed linearity in the concentration range of 10 - 60 µg mL-1 and 2- 12 µg mL-1 with r²= 0.99, respectively. The amounts of both these drugs estimated by proposed method were found to be in good agreement with label claim. The developed method was validated for sensitivity, accuracy, precision, ruggedness and robustness. The LOD and LOQ were found to be 0.30 µg mL-1 and 0.91 µg mL-1 for MOX and 0.10 µg mL-1 and 0.30 µg mL-1 for DSP. The proposed method can be used for routine analysis of both these drugs simultaneously in their combined dosage form.
