气相色谱法检测甘蓝及土壤中的氟铃脲残留

Residue determination of hexaflumuron in cabbage and soil by gas chromatography

中文关键词:  氟铃脲  甘蓝  土壤  气相色谱  残留分析

英文关键词:hexaflumuron  cabbage  soil  gas chromatography  residue analysis

中文摘要:

      目的 建立氟铃脲在甘蓝及土壤中残留的气相色谱检测方法。方法 甘蓝和土壤样品用乙腈提取, 采用气相色谱电子捕获检测器进行检测。结果 在0.05~10 mg/L范围内, 氟铃脲浓度与色谱峰面积呈良好线性关系, 相关系数0.9998, 氟铃脲的最小检出量为0.018 ng。氟铃脲在甘蓝和土壤中的添加回收率分别为85.41%~93.44%和88.41%~96.05%, 相对标准偏差分别为2.17%~7.52%和 4.37%~7.33%, 最低检测浓度为0.02 mg/kg。结论 本方法具有操作简单、准确度高、重现性好、实用性强等特点, 符合农药残留分析的要求。

英文摘要:

      Objective To establish a gas chromatography method for determining the residues of hexaflumuron in cabbage and cabbage planting soil. Methods The samples of cabbage and soil were extracted with acetonitrile and determined by gas chromatography with ECD detector. Results The method showed a good linearity between the concentration of hexaflumuron and the peak areas in the range of 0.05~10 mg/L with r=0.9998. The limits of detection (LOD) was 0.018 ng. The average recoveries were 85.41%~93.44% in cabbage and 88.41%~96.05% in soil, and the relative standard deviations (RSD) ranged from 2.17%~7.52% in cabbage and 4.37%~7.33% in soil, respectively. The limits of quantification (LOQ) was 0.02 mg/kg. Conclusion The established method is simple, accurate, reproducible and practical, and can meet the requirements of pesticide residue analysis.