Residual determination of Ceftiofur in Raw Bovine Milk by Liquid Chromatography-Electrospray Mass Spectrometry
Lim, J.H.;Park, B.K.;Kim, M.S.;Jang, B.S.;Yun, H.I.(Chungnam National University, Daejeon, Republic of Korea)E-mail:hiyun@cnu.ac.kr | Kim, D.(Kangwon National University, Chuncheon, Republic of Korea)
This report describes the determination of ceftiofur residues in milk from treatment of lactating dairy cattle by intramuscular injection of three consecutive daily doses of about 1 mg /kg BW, the recommended label dosing. The separation of ceftiofur was achieved on C∧18 reverse phase column. The mobile phase consisted of 0.1% trifluoracetic acid in water (A) and 0.05% acetic acid in acetonitrile (B) and grediently flowed at the flow rate of 0.4 mL/min. As a result of analysis of blank raw bovine milk samples, matrix interference was not shown.
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