建立了谷物类饲料中10种雄性激素、11种孕激素、10种糖皮质激素、5种雌性激素以及5种二羟基苯甲酸内酯类药物的液相色谱-串联质谱(LC-MS/MS)检测方法.均质样品经乙酸乙酯提取,以改良的QuEChERS吸附剂分散于提取液中实现快速净化.采用C18色谱柱(150 mm×2.1 mm,3.0 μm)分离,分别在正、负电喷雾串联质谱多反应监测模式下检测.在优化条件下,41种化合物在5.0~200.0μg/kg含量范围内有良好的线性相关性,相关系数均不低于0.99,定量限(S/N≥10)为0.123~2.72μg/kg.在5、40、200μg/kg或10、40、200μg/kg 3个添加水平下,豆粕类饲料中各化合物的回收率为70.3%~118.1%,相对标准偏差(RSD)为0.82%~19.5%;玉米类饲料中各化合物的回收率为76.1%~122.8%,RSD为1.3%~15.0%.该方法简便、快速、准确,可用于谷物类饲料中雄性激素、孕激素、糖皮质激素、雌性激素以及二羟基苯甲酸内酯类激素的筛查和测定.
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