Combination of nano-onion-based dispersive solid phase extraction combined with deep eutectic solvent-based dispersive liquid–liquid microextraction for trace analysis of pesticides

Mokhtari, Saba; Khosrowshahi, Elnaz Marzi; Farajzadeh, Mir Ali; Mogaddam, Mohammad Reza Afshar; Nemati, Mahboob

doi:10.1016/j.microc.2022.107983

Cited by 8 publications

(1 citation statement)

References 25 publications

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“…DES are prepared by mixing two components (solid or liquid)—a hydrogen bond acceptor (HBA) and a hydrogen bond donor (HBD)—able to interact with each other through hydrogen bonding. The resulting DES are liquid at ambient temperature and nowadays are widely used in different fields [ 18 – 22 ]. However, the use of DES in molecular imprinting is still at an early stage of development, and DES have mainly been used as auxiliary solvents in combination with conventional solvents as porogens.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of deep eutectic solvents in the synthesis of molecularly imprinted fibers for the solid-phase microextraction of triazines in soil samples

Monnier,

Díaz-Álvarez,

Turiel

et al. 2024

Anal Bioanal Chem

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Nowadays, molecularly imprinted polymers (MIPs) are well established and are considered excellent materials for performing selective extractions. However, with the progressive implementation of the principles of green chemistry, it is necessary to find greener alternatives for both the synthesis and further use of MIPs in sample preparation. Accordingly, in the present work, different deep eutectic solvents (DES, both hydrophilic and hydrophobic), as an alternative to conventional organic solvents (i.e., toluene), were evaluated as porogens for the synthesis of imprinted fibers (monoliths), using fused silica capillaries as molds, for solid-phase microextraction (SPME). From this study, the polymer prepared with propazine (dummy template), methacrylic acid (monomer), ethylene glycol dimethacrylate (cross-linker), and a formic acid:L-menthol (1:1) DES (porogen) showed the best performance for selective rebinding of triazines. After optimization of the different variables involved in SPME, the new imprinted fibers were successfully applied to the extraction of target analytes (desisopropylatrazine, desethylatrazine, simazine, and atrazine) from soil sample extracts, providing relative recoveries ranging from 75.7 to 120.1%, reaching limits of detection within the range of 6.2–15.7 ng g−1, depending upon the analyte. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%