Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
7618230 | Journal of Chromatography B | 2013 | 8 Pages |
Abstract
An ultra-performance liquid chromatography with tandem mass spectrometric detection (UPLC-MS/MS) method was developed for the detection of flunixin residues in rabbit tissues. The samples were extracted with acidic acetonitrile, defatted with n-hexane, and then purified by HLB solid-phase extraction cartridge. Analysis was carried out on UPLC-ESI-MS/MS working with multiple reaction monitoring (MRM) mode. The limits of detection (LODs) of the method were 0.3-0.8 μg kgâ1 and limits of quantification (LOQs) were 1.0-3.0 μg kgâ1 in rabbit tissues, respectively. In all fortified samples at a concentration range of 1.0-300.0 μg kgâ1, mean recoveries were 61.7-115.7% with relative standard deviations (RSDs) below 16%. Residue depletion of flunixin in rabbit was conducted after oral administration at a dose of 5 mg kgâ1 of body weight. The average concentrations for flunixin measured 2 h post-administration in kidney and intestine were significantly higher than in liver, heart and muscle. The concentrations for flunixin in all rabbit tissues were below the LOD or not detected in all tissues after 96 h administration of drug. A minimum withdrawal time of 21 h was indicated for residue levels in heart, liver, kidney, intestine and muscle below the maximum residue limits (MRLs).
Keywords
Related Topics
Physical Sciences and Engineering
Chemistry
Analytical Chemistry
Authors
Ai-Ling Zhu, Tao Peng, Liang Liu, Xi Xia, Ting Hu, Xiao-Qi Tao, Kai Wen, Lin-Li Cheng, Jian-Cheng Li, Shuang-Yang Ding, Xing-Yuan Cao, Hai-Yang Jiang,