建立了超高效液相色谱-串联质谱(UPLC-MS/MS)测定牛肉中9种头孢菌素类药物残留的方法.头孢菌素类药物经乙腈-水溶液提取,Oasis HLB柱净化.以乙腈-水(含0.05%甲酸)为流动相,UPLC-MS/MS法测定.结果表明,9种头孢菌素类抗生素在 5 min 内达到分离.头孢呋辛的定量限为10 μg/kg,头孢洛宁和头孢噻夫的定量限为0.5 μg/kg,其他头孢菌素的定量限均为1.0 μg/kg.加标回收率为74.2% ~119% ,精密度(RSD)≤15% .该方法简单、灵敏、可靠,适用于牛肉中头孢菌素类药物残留的分析确证.
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