title: [Simultaneous determination of tetracyclines, sulfonamides and quinolones residues in chicken livers by ultra performance liquid chromatography-tandem mass spectrometry].
abstract: An analytical method for the simultaneous determination of 3 tetracyclines, 10 sulfonamides and 8 quinolones in chicken livers by ultra performance liquid chromatography coupled with tandem quadrupole mass spectrometry (UPLC-MS/MS) in positive ion mode with multiple reaction monitoring (MRM) has been developed and validated. A total of 2 g homogenized sample of chicken livers was placed in a 50 mL polypropylene tube, and 1 mL of McIlvaine buffer and 4 mL of acetonitrile were added. After stirring and centrifuging for 5 min at 4,000 r/min, the supernatant was collected and the remains was extracted by 5 mL acetonitrile. The supernatant was merged together and evaporated to dryness under a steam of nitrogen at 60 degrees C. The residue was dissolved with 4 mL of phosphoric acid-triethylamine buffer-acetonitrile (85:15, v/v) and 4 mL of n-hexane. After stirring for 1 min and centrifuging for 5 min at 4 000 r/min, the under layer solution was analyzed using UPLC-MS/MS. The satisfactory recoveries (66.8% - 128.5%) of all the veterinary drugs were demonstrated at spiked levels of 5, 10 and 50 microg/kg with the overall relative standard deviations (RSDs) for intra-day and inter-day of the 21 analytes less than 20.5%. The limit of detection (LOD) and the limit of quantification (LOQ) were 2 microg/kg and 5 microg/kg, respectively for each drug. This method has good stability, lower detection limits and can be used as a conclusive evidence method of these drug residues in chicken livers.
authors: College of Veterinary Medicine, China Agricultural University, Beijing, China.
authors: Liming
authors: L
authors: Guo
authors: Kui
authors: K
authors: Zhu
authors: Haiyang
authors: H
authors: Jiang
authors: Jiancheng
authors: J
authors: Li
authors: Xiaowei
authors: X
authors: Li
authors: Shuangyang
authors: S
authors: Ding
mesh_terms: D000818:Animals; D002645:Chickens; D002851:Chromatography, High Pressure Liquid / Q000379:methods*; D004350:Drug Residues / Q000032:analysis; D005506:Food Contamination / Q000032:analysis; D008099:Liver / Q000737:chemistry*; D015363:Quinolones / Q000032:analysis*; D013449:Sulfonamides / Q000032:analysis*; D053719:Tandem Mass Spectrometry / Q000379:methods; D013754:Tetracyclines / Q000032:analysis*
chemical_list: D015363:Quinolones; D013449:Sulfonamides; D013754:Tetracyclines