PMID- 21056723 OWN - NLM STAT- MEDLINE DCOM- 20110314 LR - 20191210 IS - 1873-4324 (Electronic) IS - 0003-2670 (Linking) VI - 682 IP - 1-2 DP - 2010 Dec 3 TI - Efficient hydrophilic interaction liquid chromatography-tandem mass spectrometry for the multiclass analysis of veterinary drugs in chicken muscle. PG - 117-29 LID - 10.1016/j.aca.2010.09.048 [doi] AB - A simple and sensitive method has been developed for multiresidue analysis of 24 important veterinary drugs (including 3 aminoglycosides, 3 beta-lactams, 2 lincosamides, 4 macrolides, 4 quinolones, 4 sulfonamides, 3 tetracyclines, and amprolium) in chicken muscle. The method involved a simple extraction using (1:1, v/v) of 2% trichloroacetic acid in water-acetonitrile, followed by removing fat with hexane, dilution of sample extract, and filtration prior to liquid chromatography-tandem mass spectrometric (LC-MS/MS) analysis. Hydrophilic interaction liquid chromatography (HILIC) proved to be very effective for separation of a wide range of polar and hydrophilic compounds (providing high sensitivity and good peak shape) compared to reversed phase and ion-pair separation. The method was successfully validated according to the European Decision 2002/657/EC. Average recoveries were 53-99% at 0.5-MRL, MRL, and 1.5-MRL spiking levels, with satisfactory precision