Abstract
A simple method for the simultaneous determination of flumequine and oxolinic acid in fish muscle with attached skin is presented. Samples of mass 3.0 g were extracted with NH3 and acetone, acidified, diluted, and analyzed by high-performance liquid chromatography. The limit of quantification was 30 μg/kg for flumequine and 20 μg/kg for oxolinic acid. The recoveries were 75–76% and 79–82% for flumequine and oxolinic acid, respectively.