摘要
建立了QuEChERS-气相色谱串联三重四极杆质谱检测蔬菜中敌敌畏、腐霉利、二甲戊灵等7种农药残留的方法。采用阴性蔬菜作为基质,排除基质的影响,消除外在干扰。样品使用1.0%乙酸-乙腈进行提取,采用QuEChERS法净化,氮气吹干、经正己烷复溶后经气相色谱串联三重四极杆质谱仪检测。结果显示,敌敌畏、腐霉利、二甲戊灵等7种农药残留在5~500 ng·mL-1浓度内线性良好,相关系数R2均大于0.990,加标回收率为83.20%~105.92%,相对标准偏差为3.9%~11.5%,相关参数满足日常检测需求,方法适用于蔬菜中农药残留的检测。
A method was developed for the determination of seven pesticide residues,including dichlorvos,chlorpyrifos and pendimethalin,in vegetables by QuEChERS-gas chromatography-triple quadrupole tandem mass spectrometry.Negative vegetables were used as the matrix to exclude the effect of matrix and eliminate the external interference.The samples were extracted with 1.0%acetic acid-acetonitrile,cleaned-up by QuEChERS method,blown dry with nitrogen,re-solubilized by n-hexane and detected by gas chromatography-triple quadrupole tandem mass spectrometry.The results showed that the linearity of the seven pesticide residues,including dichlorvos,chlorpyrifos and pendimethalin,was good in the concentration range of 5~500 ng·mL^(-1),with the correlation coefficients of R2 greater than 0.990,and the recoveries of spiked standards ranged from 83.20%to 105.92%with the relative standard deviations of 3.9%~11.5%,which were satisfied with the requirements of daily testing,and the method is suitable for the determination of pesticide residues in vegetables.
作者
葛斌
GE Bin(Zhengzhou Food and Drug Inspection Institute,Zhengzhou 450000,China)
出处
《食品安全导刊》
2023年第11期105-107,共3页
China Food Safety Magazine
