气相色谱法快速测定农药产品中7种高毒有机磷类农药

摘要

建立了利用气相色谱测定农药制剂中7种有机磷类高毒农药的定量分析方法.采用气相色谱SE-30毛细管色谱柱、氢火焰离子化检测器,以邻苯二甲酸二戊酯为内标物,对试样中甲胺磷、氧乐果、久效磷、甲拌磷、特丁硫磷、甲基对硫磷、对硫磷进行分离、定量检测.结果表明,7种有机磷农药的标准偏差为0.008~0.028,变异系数为1.9%~6.4%,3个质量水平的样品加标回收率范围为97.2%~102.5%,线性相关系数均大于0.999.该方法简便、快捷、有效,且精密度和准确度高,线性关系良好.%A gas chromatography method for quantitive determination of 7 kinds of organic phosphorus pesticides in agrochemical was established. Methamidophos, omethoate, monocrotophos, terbufos, phorate, parathion-methyl, parathion were separated on gas chromatography with SE-30 chromatographic column, using diamyl phthalate as internal standard, and detected by flame ionization ditector. The results showed that the standard deviations of 7 kinds of organic phosphorus pesticides were 0.008-0.028, the coefficients of variation were 1.9%-6.4%, the average recoveries were 97.2%-102.5%, the linear correlation coefficients were over 0.999. The separation method is simple, rapid and effective.