PMID- 19938494 OWN - NLM STAT- MEDLINE DCOM- 20101005 LR - 20161018 IS - 1000-8713 (Print) IS - 1000-8713 (Linking) VI - 27 IP - 4 DP - 2009 Jul TI - [Simultaneous determination of tetracyclines, sulfonamides and quinolones residues in chicken livers by ultra performance liquid chromatography-tandem mass spectrometry]. PG - 412-6 AB - 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. FAU - Guo, Liming AU - Guo L AD - College of Veterinary Medicine, China Agricultural University, Beijing, China. FAU - Zhu, Kui AU - Zhu K FAU - Jiang, Haiyang AU - Jiang H FAU - Li, Jiancheng AU - Li J FAU - Li, Xiaowei AU - Li X FAU - Ding, Shuangyang AU - Ding S LA - chi PT - English Abstract PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - China TA - Se Pu JT - Se pu = Chinese journal of chromatography JID - 9424804 RN - 0 (Quinolones) RN - 0 (Sulfonamides) RN - 0 (Tetracyclines) SB - IM MH - Animals MH - Chickens MH - Chromatography, High Pressure Liquid/*methods MH - Drug Residues/analysis MH - Food Contamination/analysis MH - Liver/*chemistry MH - Quinolones/*analysis MH - Sulfonamides/*analysis MH - Tandem Mass Spectrometry/methods MH - Tetracyclines/*analysis EDAT- 2009/11/27 06:00 MHDA- 2010/10/06 06:00 CRDT- 2009/11/27 06:00 PHST- 2009/11/27 06:00 [entrez] PHST- 2009/11/27 06:00 [pubmed] PHST- 2010/10/06 06:00 [medline] PST - ppublish SO - Se Pu. 2009 Jul;27(4):412-6.