谷物及土壤中氟虫腈残留分析方法研究

本文报道了稻米、小麦、玉米等谷物及水稻秸秆和土壤中氟虫腈残留量检测方法。样品采用乙腈为提取溶剂，超声波振荡提取，谷物及秸秆提取液经柱层析净化，采用气相色谱电子俘获检测器检测。在0.01～0.5mg/kg的添加浓度范围内，氟虫腈的平均回收率在80.60%～99.66%之间，相对标准偏差低于9%，最小检测浓度为0.01mg/kg。方法的灵敏度与准确度符合农药残留分析要求。

Development of a Method for Determination of Fipronil Residue in Cereal and Soil

A method was developed to analysis residue of fipronil in cereal and soil. After acetonitrile was add-ed, the samples were sonicated in an ultrasonic water bath and then centrifuged, filtered, and cleaned up by a column containing neutral alumina and active carbon, successive eluted by ethyl acetate/n-hexane (3:5, V/V). The pesticide residues were determined by gas chromatography with electron-capture detection. Recoveries at spiked concentrations between 0.01 to 0.5 mg/kg were 80.60%-99.66% with RSDs less than 9%. The limit of detection was 0.01 mg/kg. The sensitivity and accuracy of the proposed method were fit for analysis of pesticide residue in cereal and soil.