Abstract

This paper describes a method for residue analysis of difloxacin and sarafloxacin in chicken muscle. Clean-up and preconcentration of the samples are effected by solid-phase extraction (C 18) and the determination is carried out by capillary electrophoresis using a photodiode array detection system. The method was validated with satisfying results. The calibration graphs are linear for difloxacin and sarafloxacin from 50 to 300 μg/kg. The limit of detection obtained for difloxacin and sarafloxacin are 10 and 25 μg/kg, respectively, which allows the detection of positive muscle samples at the required maximum residue limits of European Union.

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