Determination of 36 Veterinary Drug Residues in Cooked Meat by Ultra Performance Liquid Chromatography-tandem Mass Spectrometry

A method was developed for the determination of amantadine sulfonamides, quinolones and chloramphenicols in cooked meat. The samples were extracted with acetonitrile-water mixtures (V:V=8:2), purified with PRiME HLB solid phase extraction column. 36 veterinary drugs were determined by ultra performance liquid chromatography-tandem mass spectrometry (UPLC-MS/MS) with an electrospray ion source (ESI±) in positive and negative ion switching scanning mode. The results showed that the 36 veterinary drugs showed a good linear relationship in the concentration range of 0.5~20.0 ng/mL (R²>0.999). The limits of detection were 0.10 μg/kg and the limits of quantitation were 0.33 μg/kg. The average recovery was 70.8%~106.9% in the range of high, medium and low concentrations (0.5, 1.0 and 5.0 μg/kg). The relative standard deviations (RSD, n=6) was 0.2%~6.2%. The method is simple, sensitive and accurate, and could be used for the determination of 36 veterinary drug residues in cooked meat.