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一种经过修改的QuEChERS方法,用GC-MS/MS同时测定小麦中的73种农药,23种PCB和16种PAH

Mengmeng Yan^1,2, Yujie Xie¹, Mengjie Shi¹

¹Chinese Academy of Quality and Inspection &Testing, Beijing 100176, China.

Analytical methods : advancing methods and applications

|September 4, 2025

概括

一种新方法使用GC-MS/MS在小麦中准确检测出73种农药,23种PCB和16种PAH. 在一些样本中,西马超过了欧盟的限制,这凸显了该方法对农药残留物分析的敏感性.

科学领域:

分析化学
环境科学
食品安全问题

背景情况:

小麦是一种易受农药,多双 (PCB) 和多环芳 (PAH) 污染的基本食品.
准确和敏感的方法对于监测小麦中的这些污染物至关重要,以确保食品安全和遵守法规.

研究的目的:

开发和验证一个改进的QuEChERS方法与气体染色学三重四极联质谱 (GC-MS/MS) 相结合.
在小麦样本中同时检测73种农药,23种PCB和16种PAH.

主要方法:

修改了QuEChERS (快速,轻松,廉价,有效,坚固,安全) 的提取和清理程序.
气色谱-三重四极联质谱 (GC-MS/MS) 用于敏感和选择性分析.
用矩阵匹配的外部标准方法进行准确的量化.

主要成果:

该方法对112种化合物显示出良好的线性 (R2> 0.995).
低检测极限 (0.15-3μg/kg-1) 和量化极限 (0.5-10μg/kg-1).
获得了高回收率 (71.2 112.1%) 和可接受的精度 (RSD < 20%).
在10个样本中检测到西马,超过了欧盟的最大残留量 (MRL).

结论:

开发的GC-MS/MS方法是灵敏的,快速的,适合在小麦中同时确定农药残留物和环境污染物.
这种方法可以有效地监测小麦中的污染物,并可能对食品安全法规产生影响.
鉴于西马的含量超过了MRL,因此需要对食品中的农药污染进行持续监测.

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