Abstract
A method for the simultaneous determination of glyphosate and aminomethylphosphonic acid (AMPA) in urine was developed using a “dilute-and-shoot” sample preparation. A 1:1 dilution of urine sample in 15 mmol L−1 heptafluorobutyric acid (HFBA) was prepared prior to being injected into the LC–MS/MS system. The chromatographic separation was achieved by a Gemini C6-Phenyl analytical column, with the gradient elution of 15 mmol L−1 HFBA in water and acetonitrile. The limits of detection and quantitation of both compounds were 2.5 ng mL−1 and 5 ng mL−1, respectively. The sample preparation time was achieved in 2 min using only 0.1 mL of urine sample. The validated method was successfully applied to glyphosate and AMPA determination in farmer urine samples.
Graphic Abstract
References
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Acknowledgements
This research was supported by the Faculty of Medicine, Chiang Mai University Research Fund [Grant no. 30-2562 and Grant no. 140-2561].
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KW, RS and AJ conceived and planned the experiments. PJ, PM, SK, MS and KW contributed to sample collection and management. PJ carried out the LC–MS/MS experiments. PJ, KW and AJ contributed to the interpretation of the results and data analysis. PJ and KW wrote the manuscript with critical feedback from all authors.
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This study was approved by the Ethics Committee of the Faculty of Medicine, Chiang Mai University, Thailand (Study code: FOR-2560-05126, FOR-2561-05301 and FOR-2562-06349). All subjects were informed about the protocol of this study and signed the consent form according to the guidelines of the Faculty of Medicine ethical committee.
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Jaikwang, P., Junkuy, A., Sapbamrer, R. et al. A Dilute-and-Shoot LC–MS/MS Method for Urinary Glyphosate and AMPA. Chromatographia 83, 467–475 (2020). https://doi.org/10.1007/s10337-019-03853-3
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DOI: https://doi.org/10.1007/s10337-019-03853-3