Abstract
Neonicotinoids (NEOs) and synthetic pyrethroids (PYRs) are active ingredients of commercial pesticides and/or insecticides with extensive indoor and outdoor applications, worldwide. Improved exposure metrics are warranted for NEOs and PYRs, if we are to better understand their human health effects. A cohort-friendly protocol for determining non-specific biomarkers of exposure to NEOs and PYRs, e.g. 6-chloronicotinic acid (6-CN) and 3-phenoxybenzoic acid (3-PBA), respectively, in human urine voids was proposed. A series of optimization experiments were conducted to validate the bioanalytical protocol using gas chromatography coupled with triple quadrupole mass spectrometry (GC-QqQ-MS/MS) in MRM mode. The method reached low detection limits for both analytes (0.075 μg L−1 for 6-CN and 0.050 μg L−1 for 3-PBA) in a short preparation and analysis time. The method used small initial urine sample volume (2 mL), short extraction time (≈ 240 min for the batches of 32 samples) and instrumental analysis time (≈ 14 min) for both pesticide metabolites in a single run. This protocol could facilitate the assessment of population exposure metrics for these pesticides and their inclusion in health risk assessment.
Abbreviations
- 2-PBA:
-
2-Phenoxybenzoic acid
- 3-PBA:
-
3-Phenoxybenzoic acid
- 6-CN:
-
6-Chloronicotinic acid
- FMU:
-
First morning void urine
- GC-QqQ-MS/MS:
-
Gas chromatography coupled with triple quadrupole mass spectrometry
- MRM:
-
Multi-reaction monitoring
- NEOs:
-
Neonicotinoids
- PYRs:
-
Pyrethroids
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Acknowledgements
The authors wish to thank the European Commission and the LIFE+ programme for funding the ORGANIKO LIFE+ project awarded to KC Makris. We thank Dr. Kalliopi Fotopoulou for preparing Fig. 1
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Charisiadis, P., Delplancke, T. & Makris, K.C. Cohort-friendly protocol for the determination of two urinary biomarkers of exposure to pyrethroids and neonicotinoids using gas chromatography-triple quadrupole mass spectrometry. Anal Bioanal Chem 411, 5013–5021 (2019). https://doi.org/10.1007/s00216-019-01925-9
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DOI: https://doi.org/10.1007/s00216-019-01925-9