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http://dx.doi.org/10.5806/AST.2008.21.6.535

Analysis of clenbuterol in bovine muscle and milk by LC-ESI/MS/MS  

Hong, Selyung (Pesticide & Veterinary Drug Residues Division, Korea Food & Drug Administration)
Jeong, Jiyoon (Pesticide & Veterinary Drug Residues Division, Korea Food & Drug Administration)
Park, Hyejin (Pesticide & Veterinary Drug Residues Division, Korea Food & Drug Administration)
Lee, Soonho (Pesticide & Veterinary Drug Residues Division, Korea Food & Drug Administration)
Lee, Jongok (Pesticide & Veterinary Drug Residues Division, Korea Food & Drug Administration)
Publication Information
Analytical Science and Technology / v.21, no.6, 2008 , pp. 535-542 More about this Journal
Abstract
A liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI/MS/MS) method was developed for the determination and confirmation of clenbuterol in bovine muscle and milk. Clenbuterol and clenbuterol-D9 using as an internal standard in samples were extracted with ethyl acetate after hydrolysis and evaporated to dryness. The extracts were dissolved in 20% methanol and cleaned using HLB solid-phase extraction cartridge. The analytes were detected by LC-ESI/MS/MS on a $C_{18}$ column. Mass spectral acquisition was done in selected reaction monitoring (SRM) in positive ion mode to provide a high degree of sensitivity. Using MS/MS with SRM mode, the transitions (precursor to product) monitored were m/z 277${\rightarrow}$203 for clenbuterol, and m/z 286${\rightarrow}$204 for internal standard. The limits of quantitation (LOQ) and mean recoveries of clenbuterol in bovine muscle were $0.2{\mu}g/kg$ and 84.3~91.1%, respectively. The LOQ and mean recoveries in milk were $0.05{\mu}g/kg$ and 87.7~98.3%, respectively.
Keywords
clenbuterol; LC-ESI/MS/MS; bovine muscle; milk;
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