Study on an electrochromatography method based on organic-inorganic hybrid molecularly imprinted monolith for determination of trace trichlorfon in vegetables

Organophosphorus compounds constitute an important class of pesticides whose the toxicity of which arises from the inhibition of the acetylcholinesterase enzyme. They exhibit a wide range of physico-chemical properties, thus rendering their determination in complex oil samples particularly difficult. To facilitate their analysis at the trace level in various samples (environmental waters, soils, vegetables…), molecularly imprinted polymers (MIPs) that are synthetic polymers possessing specific cavities designed for a target molecule have been prepared. Often called synthetic antibodies, MIPs can replace antibodies in different application fields. Indeed, as immunosorbents, MIPs can be used as selective sorbents for the solid phase extraction of target analytes from complex matrices or as recognition elements in sensors. Their synthesis, characterization and use as selective sorbent for the selective recognition of organophosphorus pesticides have been already largely described and are summarized in this review.

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“…capillary. This capillary was applied to the analysis of trichlorfon in cucumber and cauliflower extracts by electrochromatography [100].…”

Section: Miscellaneous Applicationsmentioning

confidence: 99%

Molecularly imprinted polymers for the determination of organophosphorus pesticides in complex samples

Boulanouar

Mezzache

Combès

et al. 2018

Talanta

123

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“…On some occasions, the monolith is prepared with a molecular imprinting technique, allowing the so-called molecularly-imprinted capillary electrochromatography (MICEC). Recently, Zhao et al applied a MICEC method for the rapid determination of organophosphorus pesticide trichlorfon residues in vegetable samples with good accuracy [52]. Coupling the molecular imprinting technique to CEC can take advantage of the high specific and good adsorption abilities of MIPs, helping to overcome the low sensitivity of CEC.…”

Section: Lc and Gc Separationsmentioning

confidence: 99%

Recent Advances and Uses of Monolithic Columns for the Analysis of Residues and Contaminants in Food

et al. 2015

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Abstract:Monolithic columns are gaining interest as excellent substitutes to conventional particle-packed columns. These columns show higher permeability and lower flow resistance than conventional liquid chromatography columns, providing high-throughput performance, resolution and separation in short run times. Monoliths possess also great potential for the clean-up and preparation of complex mixtures. In situ polymerization inside appropriate supports allows the development of several microextraction formats, such as in-tube solid-phase and pipette tip-based extractions. These techniques using porous monoliths offer several advantages, including miniaturization and on-line coupling with analytical instruments. Additionally, monoliths are ideal support media for imprinting template-specific sites, resulting in the so-called molecularly-imprinted monoliths, with ultra-high selectivity. In this review, time-saving LC columns and preparative applications applied to the analysis of residues and contaminants in food in 2010-2014 are described, focusing on recent improvements in design and with emphasis in automated on-line systems and innovative materials and formats.

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“…The approach was used for selectively recognizing trichlorfon . In this study, MAA was used as functional monomer and γ‐MPS cross‐linker.…”

Section: Silica‐based Mipmentioning

confidence: 99%

Current trends in the development of molecularly imprinted polymers in CEC

Wei

Liu

2015

Electrophoresis

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This review focused on the developments in the field of molecularly imprinted polymers (MIPs) for CEC since 2009. New preparation techniques of MIP-based CEC, such as, portable microchip with macroporous monolithic imprinted microchannel, and low cross-linking MIPs based on liquid crystalline monomers, were discussed. Using selected cases rather than a comprehensive review of the entire field, our goal is to highlight the studies of the interest with an emphasis on recent work, and offers suggestions for future development in the field of imprinted materials for CEC separation.

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Study on an electrochromatography method based on organic-inorganic hybrid molecularly imprinted monolith for determination of trace trichlorfon in vegetables

Abstract: With good properties of high sensitivity and simple pre-treatment, this MICEC method could provide a new tool for the rapid determination of trace trichlorfon residue in complex food samples.

Cited by 20 publications

References 37 publications

Molecularly imprinted polymers for the determination of organophosphorus pesticides in complex samples

Molecularly imprinted polymers for the determination of organophosphorus pesticides in complex samples

Recent Advances and Uses of Monolithic Columns for the Analysis of Residues and Contaminants in Food

Current trends in the development of molecularly imprinted polymers in CEC

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