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建立了测定8种植物源食品中四溴菊酯残留的高效液相色谱-串联质谱分析方法。样品以乙酸乙酯为提取剂,经浓缩、净化,用流动相定容,采用高效液相色谱分离,以串联质谱在多反应监测模式下测定。结果表明,四溴菊酯质量浓度在20～1000μg/L范围内线性良好,相关系数为0.9998;在0.01、0.02和0.1 mg/kg(粮谷类样品)和0.005、0.01和0.05 mg/kg(果蔬类样品)添加水平下的回收率为81.6%～92.1%,相对标准偏差为4.0%～13%,定量限为0.01 mg/kg(粮谷类样品)和0.005 mg/kg(果蔬类样品)。
A high performance liquid chromatography-tandem mass spectrometry (HPLC-MS / MS) method was established for the determination of tralomethrin residues in eight plant-derived foods. The sample was extracted with ethyl acetate, concentrated and purified. The mobile phase was fixed with mobile phase, separated by high performance liquid chromatography and determined by tandem mass spectrometry in a multi-reaction monitoring mode. The results showed that the concentration of tralomethrin in the range of 20-1000 μg / L was good and the correlation coefficient was 0.9998. The correlation coefficient was 0.9998 at 0.01, 0.02 and 0.1 mg / kg (grain and cereal samples) and 0.005, 0.01 and 0.05 mg / kg The recoveries were 81.6% ~ 92.1% with relative standard deviations of 4.0% ~ 13%. The limits of quantification were 0.01 mg / kg (cereals and cereals) and 0.005 mg / kg (fruits and vegetables).