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7672446 
Journal Article 
Determination of chloramphenicol, thiamphenicol, florfenicol, and florfenicol amine in poultry and porcine muscle and liver by gas chromatography-negative chemical ionization mass spectrometry 
Shen, J; Xia, X; Jiang, H; Li, C; Li, J; Li, X; Ding, S 
2009 
Yes 
Journal of Chromatography B: Analytical Technologies in the Biomedical and Life Sciences
ISSN: 1570-0232
EISSN: 1873-376X 
877 
14-15 
1523-1529 
English 
19395324 
WOS:000266209600015 
A sensitive and reliable method using gas chromatography-negative chemical ionization mass spectrometry (GC-NCI/MS) was developed for the simultaneous determination of chloramphenicol (CAP), thiamphenicol (TAP), florfenicol (FF), and florfenicol amine (FFA) at trace levels in muscle and liver. Before extraction with ethyl acetate, CAP-d(5) was added to tissue samples as internal standard. The organic extracts were frozen to remove lipid and further purified by liquid-liquid extraction (LLE) with hexane and solid-phase extraction (SPE) using Oasis HLB cartridges. The target compounds were derivatized with BSTFA+1% TMCS prior to GC-NCI/MS determination in selected ion monitoring mode (SIM). The recovery values ranged from 78.5 to 105.5%, with relative standard deviations (RSD) <17%. The limits of detections (LODs) of 0.1 microg/kg for CAP and 0.5 microg/kg for TAP, FF, and FFA were obtain. Incurred sample and samples from local market were successfully analyzed using this method. 
Chloramphenicol; Florfenicol; Florfenicol amine; GC-NCI/MS; Liver; Muscle; Thiamphenicol