职业与健康 ›› 2026, Vol. 42 ›› Issue (5): 609-613.

• 论著 • 上一篇    下一篇

QuEChERS-LC-MS/MS法测定芹菜中6种农药残留含量的不确定度评定

翟亚楠, 徐倩, 刘灵坤, 邵寒冰, 卢伟, 杨凤艳   

  1. 沧州市疾病预防控制中心,河北,沧州 061000
  • 收稿日期:2025-05-28 修回日期:2025-06-23 出版日期:2026-03-01 发布日期:2026-03-10
  • 作者简介:翟亚楠,女,副主任检验技师,主要从事理化检验及实验室质量管理工作。
  • 基金资助:
    河北省医学科学研究课题计划资助(20241976)

Evaluation of uncertainty in the determination of six pesticide residues in celery by QuEChERS-LC-MS/MS method

ZHAI Yanan, XU Qian, LIU Lingkun, SHAO Hanbing, LU Wei, YANG Fengyan   

  1. Cangzhou Center for Disease Control and Prevention,Cangzhou,Hebei 061000,China
  • Received:2025-05-28 Revised:2025-06-23 Online:2026-03-01 Published:2026-03-10

摘要:

目的 对QuEChERS-LC-MS/MS法测定芹菜中苯醚甲环唑、吡虫啉、啶虫脒、呋虫胺、嘧霉胺、噻虫嗪6种农药残留含量的不确定度进行评估。方法 按照GB 23200.121—2021《食品安全国家标准 植物源性食品中 331 种农药及其代谢物残留量的测定 液相色谱—质谱联用法》测定芹菜中苯醚甲环唑、吡虫啉、啶虫脒、呋虫胺、嘧霉胺、噻虫嗪6种农药残留量,建立数学模型,分析样品称量、标准溶液配制、标准曲线拟合、重复测定、方法回收率、仪器设备六方面的因素并进行量化。结果 当样品中苯醚甲环唑、吡虫啉、啶虫脒、呋虫胺、嘧霉胺、噻虫嗪的含量分别为4.56、1.36、1.38、0.850、20.2、1.48 mg/kg水平时,扩展不确定度分别为0.838、0.192、0.170、0.124、2.08、0.170 mg/kg。结论 该方法的不确定度来源主要是仪器设备、标准曲线拟合、重复性及回收率、样品称量和标准溶液配制,评定的结果可以为使用OuEChERS-LC-MS/MS法测定芹菜中农药残留测量结果的准确性提供依据。

关键词: 芹菜, 苯醚甲环唑, 吡虫啉, 啶虫脒, 呋虫胺, 嘧霉胺, 噻虫嗪, 不确定度评定

Abstract:

Objective To evaluate the uncertainty in the determination of six pesticide residues(difenoconazole,imidacloprid,acetamiprid,dinotefuran,pyrimethanil,and thiamethoxam) in celery using the QuEChERS-LC-MS/MS method. Methods The residues of the six pesticides in celery were determined according to GB 23200.121-2021 "National Food Safety Standard-Determination of Residues of 331 Pesticides and Their Metabolites in Foods of Plant Origin by Liquid Chromatography-Tandem Mass Spectrometry". A mathematical model was established to analyze and quantify the factors contributing to uncertainty,including sample weighing,standard solution preparation,standard curve fitting,repeatability,method recovery,and instrument performance. Results When the contents of difenoconazole,imidacloprid,acetamiprid,dinotefuran,pyrimethanil,and thiamethoxam in the samples were 4.56,1.36,1.38,0.850,20.2,and 1.48 mg/kg,respectively,the expanded uncertainties were 0.838,0.192,0.170,0.124,2.08,and 0.170 mg/kg. Conclusion The main sources of uncertainty in this method are instrument performance,standard curve fitting,repeatability,recovery,sample weighing,and standard solution preparation. The results of this assessment can provide a basis for the accuracy of pesticide residue measurements in celery using the QuEChERS-LC-MS/MS method.

Key words: Celery, Difenoconazole, Imidacloprid, Acetamiprid, Dinotefuran, Pyrimethanil, Thiamethoxam, Uncertainty evaluation

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