油料作物及其油脂制品中草除灵残留量的检测

Benazolin residues detection in oil-bearing crops and its products

为建立一种气相色谱法测定油料作物及其油脂制品中草除灵残留量的检测方法,以正己烷饱和的乙腈为提取试剂,用乙腈饱和的正己烷进行脱脂,再用弗罗里硅土小柱进行净化,采用具电子捕获检测器的气相色谱仪进行测定。结果表明:草除灵的线性关系良好,相关系数可达0.999,样品加标回收率为91.2%~122.7%、变异系数为2.23%~8.16%、方法检出限为0.005 mg/kg。该方法的前处理技术适用于油料作物及其油脂制品,能够准确、灵敏、简便、快速地测定草除灵残留量。

A detection method was developed for benazolin residues in oil-bearing crops and its products.The oil-bearing crops and its products were extracted with acetonitrile saturated by n-hexane,degreased with n-hexane saturated by acetonitrile,and refined with Florisil SPE column in order to prepare test liquids.The test liquids were analyzed by gas chromatography with electron capture detector for getting the benazolin residues in oil-bearing crops and its products.The liner relation of benazolin was good and the correlation coefficient was 0.999.The recovery rates of benazolin were between91.2%~122.7%.The variation coefficients were between 2.23% ~8.16%.The limit of detection（LOD）of benazolin was 0.005mg/kg.The pretreatment technology of the method is suitable for oil-bearing crops and its products.This method could be accurate,sensitive,simple and rapid determination of operating benazolin residues.