蔬菜、水果中12种限量有机磷农药残留量测定方法

Multiresidue determination of organophosphorus pesticides in vegetables and fruits

建立了蔬菜、水果中12种限量有机磷农药的提取、净化及毛细管柱气相色谱测定法。目标农药经乙腈萃取,弗罗里硅土柱净化,浓缩后用带火焰光度检测器(FPD)的双塔双柱气相色谱测定,前柱(DB-17)定量,后柱(DB-1)定性。12种农药线性良好,线性相关系数大于0.9990,对蔬菜、水果添加0.01～0.1mg/kg的水平,12种有机磷的平均回收率在70.9%～119.9%之间,相对标准偏差0.12%～12%,本方法的最低检测限0.005～0.05mg/kg。

A multiresidue analysis method was established for the determination of 12 organophosphorus pesticides residues in vegetables and fruits. The procedure involved extraction with acetonitrile,cleane-up by Florisil SPE cartridge and determination by gas chromatography (flame photometric detector) with dual tower and dual column. The former column DB-17 was used as quantity and the later column DB-1 quality. The results presented the excellent linearity between analytical signal and analyte concentration,and th...