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<p>Differences in matrix effects caused by different types of tea in the analysis of pesticide residues via gas chromatography-tandem mass spectrometry (GC–MS/MS) have not been well studied. This study evaluated the matrix effects of 181 pesticides in three types of tea with different fermentation degrees using GC–MS/MS. The median values of the matrix effects of 181 pesticides for green tea, black tea, and dark tea were 179%, 26%, and 197%, respectively. Among these pesticides, 58 exhibit significant differences in their matrix effects across the three tea matrices. A GC–MS/MS method for 181 pesticide residues in tea was validated using the matrix-matched standards prepared from blank tea samples with a fermentation degree consistent with that of the test samples. The results showed that the recoveries for more than 95% of the pesticides ranged from 60 to 120%, with relative standard deviations (RSDs) less than 25%. The limits of quantitation (LOQs) spanned a range from 5 to 50&#xa0;μg/kg. When applied to the detection of real-world tea samples, this method achieved a significant reduction in detection errors for 9 pesticides by 21.66–100%. It is recommended that the matrix matched standard solutions be prepared from blank tea with the same fermentation degree as the test samples for the analysis of pesticide residues in different types of tea via GC–MS/MS.</p>

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Matrix Effect Evaluation and Method Validation of 181 Pesticides in Three Types of Tea Using Gas Chromatography-Tandem Mass Spectrometry

  • 期刊论文

  • 发表日期：

    2025年10月16日

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  • Danyang Zhang,
  • Xiaoning Yang,
  • Lei Zhu,
  • Miao Yu,
  • Menglu Chen,
  • Qinghua Wang,
  • Ying Jiang,
  • Hongping Chen,
  • Yunfeng Chai

摘要

Differences in matrix effects caused by different types of tea in the analysis of pesticide residues via gas chromatography-tandem mass spectrometry (GC–MS/MS) have not been well studied. This study evaluated the matrix effects of 181 pesticides in three types of tea with different fermentation degrees using GC–MS/MS. The median values of the matrix effects of 181 pesticides for green tea, black tea, and dark tea were 179%, 26%, and 197%, respectively. Among these pesticides, 58 exhibit significant differences in their matrix effects across the three tea matrices. A GC–MS/MS method for 181 pesticide residues in tea was validated using the matrix-matched standards prepared from blank tea samples with a fermentation degree consistent with that of the test samples. The results showed that the recoveries for more than 95% of the pesticides ranged from 60 to 120%, with relative standard deviations (RSDs) less than 25%. The limits of quantitation (LOQs) spanned a range from 5 to 50 μg/kg. When applied to the detection of real-world tea samples, this method achieved a significant reduction in detection errors for 9 pesticides by 21.66–100%. It is recommended that the matrix matched standard solutions be prepared from blank tea with the same fermentation degree as the test samples for the analysis of pesticide residues in different types of tea via GC–MS/MS.