A method for extracting, clearing off and determining the residues of cyhalothrin, escy-permethrin, fenvalerate and deltamethrin in soil was established. In this method the residues of the pesticides in soil were extracted by acetonitrile and purified by H2SO4-ethanol, then measured by GC. The recovery of the method ranged from 84.14% to 105.15%, with CV from 1.24% to 5.82%. This method was proved to be low in cost, easy in operation, and high in purification, reproductivity and feasibility.
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吴萍,施海燕,韩志华,王鸣华.浓硫酸纯化-气相色谱法测定土壤中拟除虫菊酯农药残留[J].土壤,2008,40(5):744-749. WU Ping, SHI Hai-yan, HAN Zhi-hua, WANG Ming-hua. Determination of residues of pyrethriods in soil by gas chromatography with H2SO4 purification[J]. Soils,2008,40(5):744-749