建立了用于检测稻田水中双甲脒农药残留的液液萃取/气质联用方法。使用GC-MS选择离子监测模式检测,考察了不同的提取溶剂和pH对检测结果的影响。在优化条件下,双甲脒在20~2000ng/mL范围内具有良好的线性关系,相关系数为0.9991,平均回收率为86.7%,精密度(n=5)为5.3%,检出限为10ng/mL。该方法快速、灵敏、准确,可用于稻田水中双甲脒的定性定量分析检验。 A liquid-liquid extraction / GC-MS method was developed for the determination of amitraz in pesticide residues in paddy field. The GC-MS selective ion monitoring mode was used to examine the effect of different extraction solvents and pH on the test results. Under optimized conditions, amitriptyline had a good linearity in the range of 20 ~ 2000ng / mL, the correlation coefficient was 0.9991, the average recovery was 86.7%, the precision (n = 5) was 5.3% and the detection limit was 10ng / mL. The method is rapid, sensitive and accurate and can be used for the qualitative and quantitative analysis of amitraz in paddy field water.