Ultrafast Liquid Chromatographic Determination of Naproxen Sodium in Pharmaceutical Dosage Form

A simple, accurate and precise reverse phase ultrafast liquid chromatographic (RP-UFLC) method for determination of naproxen sodium (NPS) has been developed and validated. Separation was achieved on a Enable; C18G column (250 × 4.6mm i.d., 5μm) using methanol: 10mM TBAHS (tetra butyl ammonium hydrogen sulfate) (80:20, v/v) as mobile phase at flow rate of 1.2mL.min-1. The detection wavelength was 231nm. The method is linear over a concentration range of 0.01-60.0 μg.mL-1 with correlation coefficient of 0.9991. The proposed method is validated by determining accuracy, precision, stability and system suitability parameters. The method was found to be robust. Specificity of the method was determined by subjecting the drug to various stress conditions like acid, alkali, oxidation, thermal and photolytic degradation. The method was used successfully for the determination of NPS in tablet dosage form.