QuEChERS-气相色谱串联质谱法测定茶叶中甲氧滴滴涕残留量  

Determination of methoxy-DDT residue in tea by QuEChERS-gas chromatography-tandem mass spectrometry

作　　者：高庆龄 蒋小迷 罗廷武 GAO Qingling;JIANG Xiaomi;LUO Tingwu(Guizhou Testing Technology Research and Application Center,Guiyang 550014,China)

机构地区：[1]贵州省检测技术研究应用中心,贵州贵阳550014

出　　处：《贵州科学》2023年第4期50-52,共3页Guizhou Science

摘　　要：基于一种QuEChERS结合气相色谱串联质谱的方法,测定茶叶中甲氧滴滴涕的残留量,样品中甲氧滴滴涕采用QuEChERS(quick,easy,cheap,effective,rugged,safe)前处理方法,用乙腈提取,试剂盒净化,动态多反映监测(DMRM)扫描,内标法以及基质匹配校准曲线精准定量,在0.01~0.20μg/mL线性范围内,相关系数值R~2=0.99902,精密度(RSD)在2.0%~7.9%之间,回收率在80.2%~90.1%之间。该方法省时省力,重现性好,线性范围宽,具有良好的灵敏度和准确度,适用于茶叶中农药多残留的检测分析。A QuEChERS-gas chromatography-tandem mass spectrometry method was developed to determine the residual amount of methoxy-DDT in tea.The sample was pretreated with QuEChERS(quick,easy,cheap,effective,rugged,safe) method,extracted with acetonitrile,purified with the kit,and scanned by DMRM.Internal standard method and matrix matching calibration curve were used for accurate quantification.In the linear range of 0.01 μg/mL to 0.20 μg/mL,the correlation coefficient R~2=0.99902,the precision(RSD) was between 2.0% and 7.9%,and the recovery rate was between 80.2% and 90.1%.This method saves time and effort,has wide linear range,good reproducibility,sensitivity and accuracy,and is suitable for the detection and analysis of pesticide residues in tea.

关 键 词：甲氧滴滴涕 QUECHERS 气相色谱串联质谱法 茶叶 农药残留 

分 类 号：O658[理学—分析化学]