【摘要】 <正> 用色谱技术测定谷物样品农药残留量的过程中。在有机溶剂的提取液里,含有干扰农药残留测定的油脂、蜡质和色素。为了进一步分离这些干扰组分,常用的方法是液液分配-层析柱分离。本文采用凝聚沉淀-疏水性溶剂萃取技术,可以满意地达到分离净化的目的。从而,建立了一个简单快速测定玉米中西维因、呋喃丹残留量的高效更多还原

【Abstract】 The residues of carbaryl and carbofuran in maice are extracted with CH3CN. Extracts are puri.’ied by loagulating with H3PO4-NH4Cl solution. Impurities are largely eliminated by partitionin, extraction with CH2Cl2. Car-bamate reidues may be determined by HPLC at levels of 0.005mg/kg (carbaryl) and 0.lmg/kg(carboluran). The recoveries of both pesticidesare from 74.% to123%.更多还原