摘要： 研究了小麦茎叶、籽粒和土壤中辛硫磷残留物的液相色谱分析方法。该方法仪器最小检出量为0.5 ng;当小麦籽粒和土壤中辛硫磷的添加浓度为0.02,0.2,2 mg/kg时,样品的平均回收率为89.8%~98.9%,变异系数为0.8%~5.7%,最低检测浓度为0.02 mg/kg;当茎叶中辛硫磷的添加浓度为0.04,0.4,2 mg/kg时,样品的平均回收率为89.7%~95.8%,变异系数为0.5%~5.9%,最低检测浓度为0.04 mg/kg。方法的灵敏度、精密度和检测限都符合农药残留分析的要求。

关键词: 辛硫磷, 高效液相色谱法, 残留, 小麦, 土壤

Abstract: A method was developed to determine residue of phoxim in wheat and soil by HPLC.The lowest detection limit of instrument for phoxim was 0.5 ng.The average recovery of wheat and soil samples at the spiked amount of 0.02,0.2,2.0 mg/kg was 89.8%-98.9%,and the coefficient of variation was 0.8%-5.7%,the lowest detectable concentrations of various samples were 0.02 mg/kg.The average recovery of plant samples at the spiked amount of 0.04,0.4,2.0 mg/kg was 89.7%-95.8%,and the coefficient of variation was 0.5%-5.9%,the lowest detectable concentration was 0.04 mg/kg.This method proved sensitive,accurate and precise for pesticide residue analysis.

Key words: Phoxim, HPLC, Residue, Wheat, Soil

中图分类号: 

• S82.3