[Quick simultaneous determination of residual veterinary drugs in processed food].

Development of rapid and high accuracy analysis, and tightening of regulations for veterinary drugs are required because many examples of detection of veterinary drugs in many kinds of processed food have been reported. In this study, we constructed an improved method for simultaneous determination of veterinary drugs, based on the glass bead homogenization method with EDTA-2Na and batch purification for QuEChERS analysis. Our extraction procedure is suitable for handling multiple samples quickly and easily. Furthermore, our improved extraction solvent allowed simultaneous determination of tetracyclines in processed food. In a test of 69 veterinary drugs, recovery of over 60 ranged from 70 to 120%, with a coefficient of variation of less than 25% and with quantification limits of 0.01 µg/g (S/N≥10 ). This improved method is expected to be useful for quick simultaneous determination of multiple residues.