Assessment of Dimethoate in Olive Oil Samples Using a Dual Responsive Molecularly Imprinting-Based Approach

MED—Mediterranean Institute for Agriculture, Environment and Development, Departamento de Fitotecnia, Escola de Ciências e Tecnologia da Universidade de Lisboa, Universidade de Évora, Pólo da Mitra, Apartado 94, 7006-554 Évora, Portugal

Centro de Química de Évora, IIFA, Universidade de Évora, Colégio L.A. Verney, 7000 Évora, Portugal

LAQV, REQUIMTE, Departamento de Química, Faculdade de Ciências e Tecnologia, Universidade Nova de Lisboa, 2829-516 Caparica, Portugal

Author to whom correspondence should be addressed.

Foods 2020, 9(5), 618; https://doi.org/10.3390/foods9050618

Received: 28 March 2020 / Revised: 3 May 2020 / Accepted: 8 May 2020 / Published: 12 May 2020

(This article belongs to the Special Issue Emerging Technologies for Determination of Contamination in Foods)

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Abstract

A new generation of advanced materials developed by molecular imprinting technology showing a stimuli-responsive functionality are emerging. The switchable ability to control the uptake/release of the target analyte by action of external stimulus combined with a remarkable selectivity and specificity, makes these functional materials very attractive for sample preparation purposes. In this work, the usefulness of a sample preparation tool for the selective enrichment/pre-concentration of dimethoate from olive oil spiked samples based on “tailor-made” dual responsive magnetic and photonic molecularly imprinted polymers as sorbents is explored. To achieve this goal, a smart molecularly imprinted polymer (MIP) possessing magnetic and photonic responsiveness was successfully synthesized, and its physico-chemical and morphological characterization was assessed. Further, the trace analysis of dimethoate in spiked olive oil samples was validated and successfully implemented using smart-MIPs as sorbents in the sample preparation step, with high recoveries (83.5 ± 0.3%) and low detection limit (0.03 µg·mL⁻¹). View Full-Text

Keywords: olive oil; dimethoate; molecularly imprinted polymers; magnetic responsiveness; photonic responsiveness

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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited

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MDPI and ACS Style

Garcia, R.; Carreiro, E.P.; Lima, J.C.; Gomes da Silva, M.; Costa Freitas, A.M.; Cabrita, M.J. Assessment of Dimethoate in Olive Oil Samples Using a Dual Responsive Molecularly Imprinting-Based Approach. Foods 2020, 9, 618. https://doi.org/10.3390/foods9050618

AMA Style

Garcia R, Carreiro EP, Lima JC, Gomes da Silva M, Costa Freitas AM, Cabrita MJ. Assessment of Dimethoate in Olive Oil Samples Using a Dual Responsive Molecularly Imprinting-Based Approach. Foods. 2020; 9(5):618. https://doi.org/10.3390/foods9050618

Chicago/Turabian Style

Garcia, Raquel, Elisabete P. Carreiro, João C. Lima, Marco Gomes da Silva, Ana M. Costa Freitas, and Maria J. Cabrita. 2020. "Assessment of Dimethoate in Olive Oil Samples Using a Dual Responsive Molecularly Imprinting-Based Approach" Foods 9, no. 5: 618. https://doi.org/10.3390/foods9050618

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Assessment of Dimethoate in Olive Oil Samples Using a Dual Responsive Molecularly Imprinting-Based Approach

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