Uptake and translocation monitoring of imidacloprid to chili and tomato plants by molecularly imprinting extraction - ion mobility spectrometry
2018; Elsevier BV; Volume: 144; Linguagem: Inglês
10.1016/j.microc.2018.09.007
ISSN1095-9149
Autoresmarzieh mohammady aria, A. Sorribes-Soriano, Mohammad T. Jafari, Farshid Nourbakhsh, Francesc A. Esteve‐Turrillas, Sergio Armenta, José Manuel Herrero‐Martínez, Miguel de la Guárdia,
Tópico(s)Pesticide and Herbicide Environmental Studies
ResumoThe degradation of imidacloprid in soil and its uptake and translocation to chili and tomato plants was evaluated, as a proof of concept, of the possibilities of the combination of molecularly imprinted polymers (MIPs) and ion mobility spectrometry (IMS) for a fast and sensitive bioprocesses monitoring tool. To do it, a method based on the selective extraction of imidacloprid from soil and plant materials was developed. In the selected conditions, the MIP-IMS procedure provided a recovery of imidacloprid in soil and plant samples from 102 to 114%, for spiked concentration levels from 0.2 to 2.0 μg g−1. Precision of the methodology, expressed as the relative standard deviation (RSD) of a 100 and 1000 μg L−1 imidacloprid standard solution was 11 and 6%, respectively, being the RSD for the analysis of a soil sample spiked at a concentration level of 1 μg g−1 of 11% (n = 4). Limits of detection and quantification of 0.03 and 0.10 μg g−1 in the solid sample were also obtained, respectively. Regarding imidacloprid degradation, this study evidenced that the process follows a first order kinetics with a half-life between 39 and 45 days in soil, being necessary a growing period of 33 days before pesticide detection in stems and leaves.
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