Simultaneous determination of 10 kinds of amide herbicide residues in dark tea by QuEChERS with Gas Chromatography-Triple Quadrupole Mass Spectrometry
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(1. Hunan Institute of Food Quality Supervision Inspection and Research, Changsha, Hunan 410017, China; 2. Hunan Provincial Key Laboratory of Food Safety Monitoring and Early Warning, Changsha, Hunan 410017, China)

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    Abstract:

    Objective: A method for simultaneous determination of 10 amide herbicide residues in dark tea was developed by QuEChERS method coupled with gas chromatography-triple quadrupole mass spectrometry (GC-MS/MS). Methods: After being extracted by acetonitrile and purified by QuChERS, the samples were separated by TG-5 SIL MS column (30 m×0.25 mm×0.25 μm), then detected bymultiple reaction monitoring mode (MRM). Blank matrix matching standard curve was used in quantitative analysis. Results: The calibration curves had a good liner relationship in the range of 0.001~0.500 mg/L with the correlation coefficients greater than 0.999. The limits of detection (LODs) and limits of quantitation (LQDs) of the method were in the range 0.001~0.002 mg/kg and 0.002~0.008 mg/kg, respectively. The average recoveries were 80.3%~103.2%, and the relative standard deviations were between 0.9% and 7.3%. Conclusion: The method can be applied to the simultaneous detection of amide herbicides in dark tea.

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易守福,梁锋,何青科,等. QuEChERS-气相色谱—三重四极杆质谱法同时测定黑茶中10种酰胺类除草剂残留[J].食品与机械英文版,2021,37(8):57-62.

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  • Received:March 22,2021
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  • Online: February 15,2023
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