Determination of oxolinic acid, danofloxacin, ciprofloxacin, and enrofloxacin in porcine and bovine meat by micellar liquid chromatography with fluorescence detection

Abstract

A method was developed for the determination of oxolinic acid, danofloxacin, ciprofloxacin and enrofloxacin by micellar liquid chromatography – fluorescence detection in commercial porcine and bovine meat. The samples were ultrasonicated in a micellar solution, free of organic solvent, to extract the analytes, and the supernatant was directly injected. The quinolones were resolved in <22 min using a mobile phase of 0.05 M SDS – 7.5% 1-propanol – 0.5% triethylamine buffered at pH 3, running through a C18 column at 1 mL/min using isocratic mode. The method was validated by the in terms of: selectivity, calibration range (0.01–0.05 to 0.5 mg/kg), linearity (r2 > 0.9998), trueness (89.3–105.1%), precision (<8.3%), decision limit (<12% over the maximum residue limit), detection capability (<21% over the maximum residue limit), ruggedness (<5.6%) and stability. The procedure was rapid, eco-friendly, safe and easy-to-handle.