Abstract
In this work, a method was developed, validated, and applied to determination of ten pesticide residues (trifluralin, carbofuran, chlorothalonil, pendimethalin, captan, tebuconazole, pyraclostrobin, difenoconazole, deltamethrin, and azoxystrobin), from seven distinct classes, in carrot samples, employing a QuEChERS procedure for the analyte extraction and gas chromatography coupled to mass spectrometry (GC-MS) for quantification. The dispersive clean-up step was optimized using different sorbents at different concentrations and mixings. The method proved to be efficient and robust, showing recoveries in the range 72–117%, and RSD ranging from 4.9 to 16.6% (except for chlorothalonil and captan) at fortification levels of 45, 90, 180, and 450 μg kg−1 with seven replicates analyzed for each level (n = 28). Chlorothalonil and captan could not be validated due to analyte stability problems. Detection limits were between 15 and 45 μg kg−1, and the quantification limits were between 45 and 90 μg kg−1. The method was successfully applied to real samples.
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Acknowledgments
The authors would like to thank to the Federal University of Rio Grande and to the Post Graduate Program in Technological and Environmental Chemistry for free and high quality education, as well as to the National Council for Scientific and Technological Development for the fellowship provided to Juliana L. da S. Batista.
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Márcia H. S. Kurz declares that she has no conflict of interest. Juliana L. da S. Batista declares that she has no conflict of interest. Lenise G. de Oliveira declares that she has no conflict of interest. Rodrigo Hoff declares that he has no conflict of interest. Manoel L. Martins declares that he has no conflict of interest. Fábio F. Gonçalves declares that he has no conflict of interest.
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Kurz, M.H.S., da S. Batista, J.L., de Oliveira, L.G. et al. Clean-up Procedure Development and Method Validation for Pesticide Residues Analysis in Carrots. Food Anal. Methods 12, 282–292 (2019). https://doi.org/10.1007/s12161-018-1359-y
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DOI: https://doi.org/10.1007/s12161-018-1359-y