采用高效液相色谱-串联质谱技术,建立了口腔卫生产品(牙膏及漱口水)中5类共13种抗生素的同时检测方法.分析物包括5种四环素类、3种大环内酯类、2种喹诺酮类、1种β-内酰胺类和2种林可胺类抗生素.样品经0.1％(体积分数,下同)甲酸溶液-乙腈(95∶5,v/v)提取,高速离心并过滤,稀释后采用C18色谱柱(150 mm×2.1mm,5 μm)分离,以0.1％甲酸溶液-乙腈为流动相梯度洗脱,采用电喷雾离子源串联质谱,在正离子扫描方式下以多反应监测(MRM)模式检测,外标法定量.13种抗生素类药物在5.0～50.0 μg/L质量浓度范围内线性关系良好(相关系数大于0.99),定量限为10.0 mg/kg.两种基质(牙膏及漱口水)样品在10、20和100 mg/kg 3个加标水平下的平均回收率为80.1％ ～115％,相对标准偏差为0.94％ ～ 8.69％.该方法准确可靠、方便快捷,适用于口腔卫生产品中抗生素类药物的定性定量分析.
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