Overcoming matrix effects in the analysis of pyrethroids in honey by a fully automated direct immersion solid-phase microextraction method using a matrix-compatible fiber

Public Time: 2021-03-15 00:00:00
Journal: Food Chemistry
doi: 10.1016/j.foodchem.2020.128127
Author: João Raul Belinato;Jonathan J. Grandy;Abir Khaled;Paola Alejandra Ortiz Suarez;Janusz Pawliszyn
Summary: Pyrethroids insecticides may constitute a major hazard to honeybees, leading to colony collapse disorder. However, the determination of pyrethroids in honey has remained a challenging undertaking for analysts to date due to the high complexity of this matrix as well as the MRLs. This paper presents a fully automated method to overcome matrix influences using matrix-compatible overcoated SPME fiber for quantitative analysis of pyrethroids in diluted honey by GC–MS. The developed method was optimized using a multivariate approach providing LOQ values much lower than the stablished MRL (0.10–10 ng/g), while granting satisfactory linearity (R, > 0.998) in a wide linear range of 0.1–2000 ng/g, repeatability with RSDs < 10%, reproducibility RSDs < 20%, and accuracy ranging from 75 to 118% and from 82 to 120 % for inter-day and intra-day assays, respectively by using five replicates. The method herein proposed overcomes challenges presented by complex matrices while minimizing sample handling and the overall complexity of the procedure.
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