采用化学共沉淀法制备了磁性石墨烯相碳化氮纳米复合材料（g-C₃N₄/Fe₃O₄），并将其作为吸附剂用于水样中3种苯基类有机农药（phenyl-OPs）的超声辅助磁性固相萃取（UAE-MSPE），采用气相色谱-电子捕获检测器（GC-ECD）对其进行分析测定。在最佳萃取/解吸条件下，该方法在0.1~200 μg/L浓度范围内线性关系良好（R²>0.9912），检出限（S/N=3）为0.02~0.12 μg/L，加标回收率为84.1%~94.2%，相对标准偏差（RSD）为3.5%~5.7%。研究表明，该方法操作简单快速、回收率高、重复性好，对环境水样中苯基类有机农药的快速筛选具有潜在的价值。

Magnetic graphene phase nitrogen carbide nanocomposites (g-C₃N₄/Fe₃O₄) are prepared via chemical co-precipitation method,and used as a sorbent for ultrasound-assisted magnetic solid-phase extraction of three phenyl organic pesticides from reservoir water.Gas chromatography with an electron capture detector (GC-ECD) are employed to determine and the synthesis conditions of g-C₃N₄/Fe₃O₄ are optimized.Under the optimum extraction/desorption conditions,the developed method offers good linearity (R²>0.991 2) in the range of 0.1-200 μg·L^-1,and low detection limits (S/N=3) of 0.02-0.12 μg·L^-1.The recoveries in spiked reservoir water samples reach 84.1%-94.2%,and relative standard deviations (RSD,for n=5) are between 3.5% and 5.7%.The developed method is simple and rapid,with high recovery and good repeatability,which exhibits potential application value for the rapid screening of phenyl organic pesticides in environmental water samples.

伍欢(1994-),女,硕士生,研究方向为色谱分离及测定,2632235470@qq.com