蔬菜中高毒有机磷农药多残留的检测方法研究

Method for Multiresidue Determination of High Acute Toxicity Organophosphorous Pesticides in Vegetables

采用J&WDB-1701型毛细管色谱柱及FPD检测器,建立了同时测定蔬菜中高毒有机磷农药甲胺磷、甲拌磷、氧乐果、毒死蜱、甲基对硫磷、对硫磷残留量的气相色谱法,测定6种有机磷农药残留量的线性范围均为0.05～5.00mg/L,相关系数为0.99868～0.99952,检出限为0.0184～0.0396mg/L,加标回收率为74.4%～98.7%,相对标准偏差为4.72%～2.17%。

A method which combined solid phase extraction (SPE) and gas chromatography for multi-residue determination of organophosphorous pesticides in vegetables was discussed in this paper. Methamidophos, phoyate, omethate, chlorpyrifos, parathion-methyl and parathion were selected as the analytic targets representing toxic organophosphorous pesticides. Satisfac- tory results could be obtained as the recoveries were greater than 80%, the entire analytic time was no longer than 1h, and the detection limit ranged from 0.0184 mg/L to 0.0396mg/L. The method discussed could be applied for quick and accurate determination of organophosphorous pesticides in vegetables.