Abstract
A simple, specific, accurate, precise and reproducible method has been developed and validated for the estimation of bromhexine hydrochloride and enrofloxacin in fixed dose combination using RP-HPLC. The separation was achieved using stationary phase ODS Hypersil C18 column (250 mm× 4.6 mm i.d.) in isocratic mode, with mobile phase containing 0.05 M potassium dihydrogen phosphate buffer (pH 4 by o-phosphoric acid) : methanol: acetonitrile : triethylamine (40:20:40:01), at a flow rate of 1.0mL/min and eluents were monitored at 256 nm. The retention time of enrofloxacin and bromhexine HCl were found to be 3.00 min and 5.1 min respectively. The linearity for bromhexine HCl and enrofloxacin was in the range of 2-15 μg/mL and 20-150 μg/mL, respectively. The method was validated as per ICH guideline. The recoveries of bromhexine HCl and enrofloxacin were found in the range of 99.61-101.65% and 99.52-100.13 %, respectively. The method was successfully applied for the determination of both the drugs in combined dosage form.
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