QuEChERS-气相色谱串联质谱法同时测定茶叶中6种农药残留
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(泉州市产品质量检验所,福建 泉州 362000)

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吴汉彬(1990—),男,泉州市产品质量检验所助理工程师。E-mail:whb855@qq.com

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Simultaneous determination of 6 pesticide residues in tea by QuEChERS-GS-MS/MS
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(Quality Inspection Institute of Quanzhou, Quanzhou, Fujian 362000, China)

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    摘要:

    目的:建立基于QuEChERS-气相色谱串联质谱法(GC-MS/MS)同时检测茶叶中烯虫乙酯、烯虫炔酯、格螨酯、氟除草醚、环螨酯、草枯醚6种农药残留的分析方法。方法:样品经QuEChERS前处理后,采用气相色谱分离、多反应监测(MRM)模式进行检测,外标法定量。结果:6种农药在0.025~2.000 mg/kg的质量浓度范围内线性良好,相关系数均>0.999,检出限为0.000 6~0.007 2 mg/kg。在0.002 5,0.05,1.0 mg/kg 3个水平的加标回收试验中,回收率为84.3%~116.3%,相对标准偏差(RSD)为1.07%~6.15%。结论:该方法快速、简便、准确,适用于茶叶中6种农药残留检测。

    Abstract:

    Objective: This study aimed to establish a method by using QuEChERS-gas chromatography tandem mass spectrometry (GC-MS/MS), to determine six pesticide residues in tea, including: hydroprene, kinoprene, genite, fluronitrofen, cycloprate, and chlornitrofen. Methods: The samples were pretreated by QuEChERS method. They were separated by gas chromatographic, detected by multiple reaction monitoring (MRM) mode and quantified by the external method. Results: All the pesticide residues showed good linearity with correlation coefficients above 0.999 when the concentration falls in the range 0.025~2.000 mg/kg, and the limits of quantitation were in the range of 0.000 6 ~0.007 2 mg/kg. In the recovery experiment of 0.002 5 mg/kg, 0.05 mg/kg, and 0.5 mg/kg at three concentrations, the average recoveries were 84.3%5~116.3%, and the relative standard deviations (RSDs) were 1.07%~6.05%. Conclusion: The method is rapid, simple, and accurate, which is suitable for the detection of these six pesticide residues in tea.

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吴汉彬. QuEChERS-气相色谱串联质谱法同时测定茶叶中6种农药残留[J].食品与机械,2023,39(6):55-58,111.
WU Han-bin. Simultaneous determination of 6 pesticide residues in tea by QuEChERS-GS-MS/MS[J]. Food & Machinery,2023,39(6):55-58,111.

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  • 收稿日期:2022-02-28
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  • 在线发布日期: 2023-10-20
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