【摘要】 对110份液体农药制剂中62种有机溶剂含量进行调查与分析,以期为农药制剂中有机溶剂相关限量规定的出台提供依据与参考。农药制剂经溶剂稀释,取上清液过0.22μm滤膜后检测分析。样品经VF-1701MS毛细管柱(60 m×0.25 mm×0.25μm)分离,采用气相色谱-质谱法,在选择离子监测(SIM)模式下测定,外标法定量。结果表明,110份液体农药制剂中108份检出包含二甲苯、N,N-二甲基甲酰胺、甲醇、甲苯、萘、乙苯等共28种有机溶剂,总含量在0.07%～77.23%之间;在已检出有机溶剂的94份乳油样品中,76份超过国家有关农药制剂中有机溶剂推荐限量。研究表明,液体农药制剂中普遍含有高浓度有机溶剂,存在较大安全风险,建议政府相关部门尽快出台有关农药制剂中有机溶剂的限量规定或标准。更多还原

【Abstract】 The aim of this study was to investigate and analyze the content of 62 organic solvents in 110 liquid pesticide formulations. The study would provide a basis and reference for the promulgation of the relevant limits of organic solvents in pesticide formulations. The pesticide formulation was diluted with solvent, and the supernatant was filtered through a 0.22 μm membrane. After separation on a VF-1701 MS column, the analytes were detected by gas chromatography-mass spectrometry(GC-MS)in the selected ion monitoring(SIM)mode and quantified using the external standard method. A total of 110 pesticide formulation samples were analyzed. The results showed that 28 kinds of organic solvents, including xylene, N,N-dimethylformamide, methanol, methylbenzene, naphthalene, and ethylbenzene,were detected in 108 samples with content ranging from 0.07% to 77.23%. Among the 94 emulsifiable concentrate(EC)samples in which organic solvents had been detected, 76 violated the relevant state regulations on the limits of organic solvents in pesticide formulations.Liquid pesticide formulations generally contained high concentration of organic solvents and had great safety risks. We suggest that government departments should promulgate relevant standard on organic solvents in pesticide formulations as soon as possible.更多还原