大口径毛细管-气相色谱法快速测定出口薏苡仁中敌敌畏、甲胺磷、毒死蜱残留量

Rapid determination of dichlorvos, methamidophos and chlorpyrifos in semen coicis for exit by gas chromatography with large-bore capillary column

目的:建立大口径毛细管-气相色谱快速测定出口薏苡仁中敌敌畏、甲胺磷、毒死蜱农药残留量的方法。方法:采用OV-1701(30m×0.53mm×0.53μm)分离和火焰光度检测器(FPD)检测,外标法计算含量。结果:线性范围:0.1～2.0μg/mL,加标回收率:82.64%～97.58%,相对标准偏差(RSD):1.57%～5.35%,检出限:0.004～0.032mg/kg。结论:本方法快速、简便、准确,适用于测定薏苡仁中敌敌畏、甲胺磷、毒死蜱农药残留。

Objective： A rapid method for determination of residues of dichlorvos, methamidophos and chlorpyrifos residues in semen coicis by gas Chromatography-Flame Photometric Detector（FPD） with Largebore Capillary Column. Methods： The column was OV-1701（30 m×0.53 mm×0.53 μm）. The pesticide residues were calculated by external standard menthod. Results： The analytical results show the working curve is linear in the range of 0.1-2.0 μg/mL. The recoveries were 82.64%-97.58%, RSD in the range of 1.57%-5.35%, the detection limits were 0.004-0.032 mg/kg for pesticides. Conclusions： It is rapid, simple and suitable for detecting the residues of pesticides in semen coicis.