Abstract
Analysis of biofluids, such as plasma, can be used to investigate occupational pesticide exposure in the agricultural industry. Considering the chemical complexity and variability of plasma samples, any protocol for pesticide analysis should achieve efficient sample cleanup to minimize matrix effects and enhance method sensitivity through analyte pre-concentration. In this work, a high-throughput method was developed for analysis of 79 pesticides, commonly used in agricultural practices, in human plasma, using biocompatible solid-phase microextraction (SPME) coupled to liquid chromatography–tandem mass spectrometry. An SPME method was developed using a biocompatible hydrophilic–lipophilic balance/polyacrylonitrile (HLB/PAN) extraction phase and demonstrated negligible matrix effects. The performance of the developed SPME method was compared to a QuEChERS —Quick, Easy, Cheap, Effective, Rugged, and Safe— method, the most common sample preparation and cleanup approach for pesticide analysis in complex matrices. Comparable accuracy and precision were achieved for both methods, with accuracy values within 70–120% and relative standard deviation < 15%. Overall, the developed SPME and QuEChERS methods extracted 79 out of 82 monitored pesticides in human plasma. The SPME protocol demonstrated higher sensitivity than the QuEChERS method and a drastic reduction of matrix effects.
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Funding
The authors thank the University of Toledo for funding and Supelco, MilliporeSigma, for providing the SPME devices tested in this work. T.C. acknowledges the Office of Undergraduate Research at the University of Toledo for providing funding to conduct this work through the Undergraduate Research Academic Year Research Program.
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Published in the topical collection Young Investigators in (Bio-)Analytical Chemistry 2023 with guest editors Zhi-Yuan Gu, Beatriz Jurado-Sánchez, Thomas H. Linz, Leandro Wang Hantao, Nongnoot Wongkaew, and Peng Wu.
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Godage, N.H., Cudjoe, E., Chau, T. et al. Quantitative determination of pesticides in human plasma using bio-SPME-LC–MS/MS: a robust tool to assess occupational exposure to pesticides. Anal Bioanal Chem 415, 4423–4434 (2023). https://doi.org/10.1007/s00216-023-04589-8
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DOI: https://doi.org/10.1007/s00216-023-04589-8