Sensitive method for rapid estimation of Lornoxicam in bulk and its dosage form by RP-HPLC

Lornoxicam (6-chloro-4-hydroxy-2-methyl-N-2-pyridyl-2H-thieno-[2,3-e]-1,2-thiazine-3-carboxamide-1,1-dioxide) is persist as a non-steroidal anti-inflammatory drug of the oxicam class with analgesic, anti-inflammatory and antipyretic properties. A fast, accurate and sensitive chromatographic method for estimation of Lornoxicam was developed as no official method available for detection. The chromatographic separation employs isocratic elution by utilizing an inertsil ODS-C18, 250 mm×4.6 mm, 5 µm columns. Mobile phase consisting of solvent (40 mL acetonitrile and 60 mL 0.1 M phosphate buffer (pH 6.8 was adjusted with triethylamine)) endowed at a flow rate of 1.0 mL/min. The analyte was detected and quantified at 290 nm using UV detector. The method was validated according to ICH guidelines, illustrating to be accurate (recovery 99.08%-101.13%) and precise (intraday (0.27-1.32) and interday (0.59-1.59))within the corresponding linear range (10-60 µg/mL) with r² 0.9992.