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目的建立高效、准确测定水中呋喃丹及5种有机磷农药的方法。方法 100 ml水样经固相萃取前处理,0.2μm滤膜过滤后,以Acquity UPLC BEH C18(2.1 mm×100 mm,1.7μm)为分析柱,0.2%甲酸和乙腈为流动相,采用正离子扫描多反应监测模式检测。结果乐果在0.9~2 000 ng/L,敌敌畏在2.5~5 000 ng/L,呋喃丹在0.6~2 000 ng/L,甲基对硫磷在19~5 000 ng/L,马拉硫磷在0.9~5 000 ng/L,毒死蜱在0.8~5 000 ng/L浓度范围内,线性关系良好,r>0.999,方法检出限为0.6~19 ng/L,回收率为89.6%~129%,RSD<11%。结论该方法高效、准确、灵敏度高,选择性好,适用于地表水及生活饮用水中上述6种农药的测定。
Objective To establish an efficient and accurate method for the determination of carbofuran and 5 organophosphorus pesticides in water. Methods 100 ml water samples were pretreated by solid-phase extraction and filtered with a 0.2 μm membrane filter. The mobile phase consisted of Acquity UPLC BEH C18 (2.1 mm × 100 mm, 1.7 μm), 0.2% formic acid and acetonitrile, Scanning multiple reaction monitoring mode detection. Results dimethoate was between 0.9-2000 ng / L, dichlorid dichloride 2.5-5000 ng / L, carbofuran 0.6-2000 ng / L, methyl parathion 19-5000 ng / L, malathion Phosphorus concentration ranged from 0.9 to 5 000 ng / L and chlorpyrifos ranged from 0.8 to 5 000 ng / L with r> 0.999. The detection limits were 0.6-19 ng / L and the recoveries were 89.6% -129 %, RSD <11%. Conclusion The method is efficient, accurate, sensitive and selective. It is suitable for the determination of the above six pesticides in surface water and drinking water.