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SPE-LC/MS/MS法同时测定烟叶中5种新烟碱类杀虫剂残留

Simultaneous Determination of Five Neonicotinoids Pesticide Residues in Tobacco Leaf with SPE-LC/MS/MS

  • 摘要: 通过比较硅胶柱、石墨化碳柱、C18柱和聚合物柱对分析物的保留能力,建立了20%甲醇水溶液超声萃取、Pesticarb石墨化碳柱固相萃取、LC-MS/MS同时测定烟叶中5种新烟碱类杀虫剂"烯啶虫胺"、"噻虫嗪"、"吡虫啉"、"啶虫咪"和"噻虫啉"残留的方法。结果表明,方法的检测限为0.005~0.009μg/mL,平均回收率为80%~92%,RSD为2.50%~4.08%。该方法适用于烟叶中这5种新烟碱类杀虫剂残留的快速检测。

     

    Abstract: By comparing the affinities of silica gel, graphitized carbon, C18, and polymer cartridges for the analyzed pesticides, a method for simultaneously determining five neonicotinoid pesticides, including nitenpyram, thiamethoxam, imidacloprid, acetamiprid and thiacloprid, left in tobacco was developed. The sample was extracted with 20% methanol/water under ultrasonic, solid phase extracted through Pesticarb graphitized carbon cartridge and detected by LC/MS/MS. The average recoveries of the pesticides ranged from 80% to 92% with RSD of 2.50% to 4.08% and limit of detection of 0.005 to 0.009 μg/mL. The method is suitable for rapidly determining the five neonicotinoid pesticide residues in tobacco.

     

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