气相色谱—串联质谱法检测茶叶中5种杀虫剂残留

宋鑫; 杭学宇; 王芹; 王露; 冯晓青; 王丹丹; 陆娟

doi:10.13421/j.cnki.hjwsxzz.2019.06.016

气相色谱—串联质谱法检测茶叶中5种杀虫剂残留

Determination of Five Insecticide Residues In Tea by GC-MS/MS

摘要

摘要:
目的研究气相色谱—三重四级杆串联质谱法定量测定茶叶中5种杀虫剂残留的方法。
方法样品由乙腈提取，快速、简单、廉价、有效、可靠和安全的方法净化，正己烷定容，经GC-MS/MS检测，以质谱多反应监测（MRM）模式监测目标化合物的特征离子进行定性定量分析。
结果 5种杀虫剂在（5~100）μg/L内线性关系良好（r>0.999），各目标物的检出限为（0.02~0.1）μg/kg（S/N=3）。在加标水平为5、10、50和80 μg/kg时，方法的回收率为74.3%~111.2%，相对标准偏差为1.2%~5.8%。
结论该方法选择性好、灵敏度高，样品净化效果好，适用于茶叶中该类杀虫剂的多残留痕迹测定。

Abstract:
Objectives A GC-MS/MS method for the quantitative determination of 5 insecticide residues in tea was developed.
Methods The samples were extracted by acetonitrile and purified by the Quick Easy Cheep Effective Ruqqed and Safe (QuEchE-RS) method. The pooled evaluate was qualitatively and quantitatively determined by tandem mass spectrometry under multi-reaction monitoring (MRM) mode.
Results Under the optimum conditions, the limit of detection (LOD) was in the ranges of (0.02~0.1)μg/kg (S/N=3) with a standard deviation of 1.2%~5.8%, and the recoveries were 74.3%~111.2%.
Conclusions This method simplifies the pretreatment operation, shortens analysis time and provides good selectivity and high sensitivity for the determination of insecticide residues in teas.

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