Study on matrix effects in the detection of 15 pesticide residues in 6 types of tea leaves

CHEN Lu; LI Huaiping; WANG Guxi; TANG Xiangkai; FENG Dejian; WEI Yuting

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CHEN L, LI H P, WANG G X, et al. Study on matrix effects in the detection of 15 pesticide residues in 6 types of tea leaves [J]. Fujian Journal of Agricultural Sciences，2024，39（6）：720−728

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CHEN L, LI H P, WANG G X, et al. Study on matrix effects in the detection of 15 pesticide residues in 6 types of tea leaves [J]. Fujian Journal of Agricultural Sciences，2024，39（6）：720−728

CHEN L, LI H P, WANG G X, et al. Study on matrix effects in the detection of 15 pesticide residues in 6 types of tea leaves [J]. Fujian Journal of Agricultural Sciences，2024，39（6）：720−728

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Study on matrix effects in the detection of 15 pesticide residues in 6 types of tea leaves

CHEN Lu^{1, 2
,},
LI Huaiping^{1, 2},
WANG Guxi^{1, 2},
TANG Xiangkai^{1, 2
,
,},
FENG Dejian^{1, 2},
WEI Yuting³

1.
Institute of Biology, National Institute of Measurement and Testing Technology, Chendu, Sichuan　610021, China
2.
Sichuan Provincial Key Laboratory of Tea Standards and Testing Technology, Chendu, Sichuan　610021, China
3.
Xichang Water Supply and Drainage Co., Ltd., Xichang, Sichuan　615000, China

Received Date: 2023-12-19
Rev Recd Date: 2024-04-19

Available Online: 2024-07-10

Abstract

Abstract

Objective Matrix effects in detecting 15 pesticide residues in six types of tea using gas chromatography-tandem mass spectrometry (GC-MS/MS) with a sample pretreatment of QuEChERS were analyzed for assay improvement. Methods Tea samples were pretreated with QuEChERS, and solvent and matrix standard curves for the mass concentrations of 0.01-0.32 mg·L⁻¹ prepared. After a GC-MS/MS determination, the matrix effects were calculated. Results Matrix effects were enhanced in the determination that ranged from 1.35-411.58% with the strong, medium, and weak matrix effects of 73.33%, 23.33%, and 3.33%, respectively. When black tea was used as an alternative matrix, they ranged 0.62-59.22% with the strong, medium, and weak matrix effects at 1.33%, 14.67% and 84.00%, respectively. Whereas, when a mixed tea was applied as an alternative matrix, suppressed matrix effects resulted at 0.09-48.09% with the strong, medium, and weak matrix effects at 0, 13.33% and 86.67%. Conclusion The matrix effects in the pesticide residue detection on teas were complex. Application of a matrix standard curve reduced the matrix effects and improved the determination accuracy. By using mixed tea sample as an alternative matrix, the analysis efficiency was significantly enhanced.
- gas chromatography-tandem mass spectrometry,
- tea,
- pesticide residue,
- matrix effect,
- alternative matrix

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References(20)

References

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