【摘要】 建立了除草剂异丙草胺在大豆和土壤中的残留分析方法。样品用甲醇与水的混合液提取,石油醚萃取,柱层析净化,GC-μECD检测,方法最小检出量为7.4×10-12g。土壤、大豆植株和籽粒中最小检测质量分数均为0.0018mg/kg,在添加水平分别为0.01、0.1、1.0mg/kg时,样品中的异丙草胺在土壤、大豆植株和籽粒中的添加回收率为分别为81.3%～96.7%、81.2%～92.5%、82.2%～92.1%,变异系数为1.60%～3.07%。更多还原

【Abstract】 A method was reported for determining propisochlor residues in soybean and soil by gas liquid chromatog-raphy equipped with micro-electron capture detector (μECD). The samples were extracted with a mixture of methanol and water. Liquid-liquid extraction was used with petroleum. The extracts were cleaned up by a column of silica gel. The limit of detection was 7.4×10-12 g,and the limit of quantification for soil,soybean plant and soybean seed was the same,0.001 8 mg/kg,while the recoveries and coefficients of variation were 81.3-96.7%,81.2-92.5%,82.2-92.1% and 1.60-3.07% at the fortified levels of 0.01,0.1,1.0 mg/kg,respectively.更多还原