菠菜中10种有机磷农药残留的气相色谱检测

为提高菠菜中有机磷类农药残留的检测准确率,采用加标回收的方式,在未检出农药的新鲜菠菜中分别加入3个浓度梯度的敌敌畏、甲胺磷、氧化乐果、毒死蜱等10种常见有机磷农药,按照NY/T 761-2008方法处理。经气相色谱检测,10种有机磷农药的平均回收率为77.4%~107.9%,相对标准偏差为1.1%~8.5%,最低检出限为0.007~0.019 mg/kg。试验所有结果均符合国家农药残留量测定方法的要求。

Detection of 10 Kinds of Organophosphorus Pesticide Residues in Spinach by Using Gas Chromatography

Recovery way was used to improve detection accuracy of organophosphorus pesticide residues in spinach.Three concentration gradients of 10 kinds of organophosphorus pesticide,like dichlorvos,methamidophos,omethoate,chlorpyrifos and so on,were added to fresh spinach with no detectable pesticides.Organophosphorus pesticide were detected by gas chromatography detection with reference to the NY/T 761-2008.The results showed that the average recovery rates of the 10 kinds of organophosphorus pesticide were 77.4% ~107.9%,and the relative standard deviation was 1.1% ~ 8.5%,and the minimum detectable limit was 0.007~ 0.019 mg/kg.All results of this test were consistent with the national pesticide residues determination requirements.