在线凝胶渗透色谱－气相质谱法检测小麦粉中的50种农药残留

摘要

The pesticide residues were extracted with acetonitrile under ultrasonic operation, and the extract was separated and detected with the on-line GPC-GC/MS system. The recoveries of the method ranged from 73.06 to 119.9 with the relative standard deviations (RSD) from 0.88 to 11.02. The limits of detection was 0.0003 ~0.009 mg/kg. The method is simple, rapid and characterized with acceptable sensitivity and reproducibility to meet the requirements for the analysis of multiple pesticide residues in oat flour.%建立在线凝胶渗透色谱-气相质谱分析小麦粉中50种农药残留的方法。样品经乙腈超声提取，提取液经GPC—GCMS在线净化、分离和检测，方法的加标回收率为73．06％～119．9％，相对标准偏差为0．88％～11．02％。方法的检出限为0．0003～0．009mg／kg，该方法样品前处理简单、快速、灵敏度高、重现性好，能够满足农药多残留检测技术的要求。