New extraction procedure to improve the determination of quinolones in poultry muscle by liquid chromatography with ultraviolet and mass spectrometric detection.

The present article aims to develop a new extraction procedure to improve the determination of quinolones in chicken muscle. This new determination method was validated using liquid chromatography-ultraviolet detection (LC-UV) and liquid chromatography-mass spectrometry detection (LC-MS), which has special bearing on stability studies. The results obtained by using the method were compared with the results obtained with a previous methodology. The new extraction procedure presents a sensitivity low enough to determine concentration of these drugs below the permissible maximum residue limits (MRL) in chicken muscle and is less time consuming than the previous methodology.