Recent advances in magnetic molecularly imprinted polymers and their application in the food safety analysis

Jia, Baoping; Feng, Feng; Wang, Xiujuan; Song, Yaxuan; Zhang, Feng

doi:10.1016/j.jfutfo.2023.05.001

Cited by 15 publications

(4 citation statements)

References 135 publications

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“…During the subsequent cycles, the modified electrode displayed a significant rise in the standard deviation signal when detecting melamine. The decrease in current observed in the ninth cycle was due to the repeated elution of melamine for the next cycle's detection, which resulted in polymer defects like cracking and swelling [66].…”

Section: Reusability and Reproducibilitymentioning

confidence: 99%

Enhancement in Sensitivity and Selectivity of Electrochemical Technique with CuO/g-C3N4 Nanocomposite Combined with Molecularly Imprinted Polymer for Melamine Detection

Limthin,

Leepheng,

Tunhoo

et al. 2024

Polymers

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This study focused on enhancing the sensitivity and selectivity to detect melamine by utilizing a photoelectrochemical method. This was achieved by combining a melamine-imprinted polymer with a CuO/g-C3N4 nanocomposite, which was synthesized through chemical precipitation and calcination. The resulting nanocomposite exhibits improved carrier mobility and photoelectrochemical properties. A molecularly imprinted receptor for selective detection was created through bulk polymerization with methacrylic acid and a melamine template. The characterization of the nanocomposite was performed using X-ray photoelectron spectroscopy for the chemical oxidation state, X-ray diffraction patterns for the crystalline structure, and ultraviolet/visible/near-infrared spectroscopy for optical properties. The CuO/g-C3N4 nanocomposite exhibits photoactivity under visible light. The modified electrode, incorporating the CuO/g-C3N4 nanocomposite and melamine-imprinted polymer, demonstrates a linear detection range of 2.5 to 50 nM, a sensitivity of 4.172 nA/nM for melamine, and a low detection limit of 0.42 nM. It shows good reproducibility and high selectivity to melamine, proving effective against interferences and real samples, showcasing the benefits of the molecularly imprinted polymer.

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Section: Reusability and Reproducibilitymentioning

confidence: 99%

Enhancement in Sensitivity and Selectivity of Electrochemical Technique with CuO/g-C3N4 Nanocomposite Combined with Molecularly Imprinted Polymer for Melamine Detection

Limthin,

Leepheng,

Tunhoo

et al. 2024

Polymers

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“…Recently, MMIPs have attracted wide attention since possess several promising characteristics in comparison with other media used for separation and adsorption [ 2 ]. These sorbents offer extensive surface areas, excellent biocompatibility, easy handling and straightforward customization.…”

Section: Introductionmentioning

confidence: 99%

“…A recent review summarizes studies that applied advanced MMIPs for the analysis of mycotoxins in food [ 2 ]. This novel sample treatment has been applied for the extraction of AFs [ 8 , 9 ] and other mycotoxins, such as ochratoxins [ 10 ], sterigmatocystin [ 11 ], patulin [ 12 , 13 ] and zearalenone [ 14 , 15 , 16 , 17 , 18 ], mainly in cereals (wheat, corn, rice, millet and coix lacryma-jobi), but also in wine, soy sauce, vinegar or juice.…”

Section: Introductionmentioning

confidence: 99%

Magnetic Molecularly Imprinted Polymers for Selective Extraction of Aflatoxins from Feeds

Pérez-Álvarez,

Arroyo-Manzanares,

Campillo

et al. 2024

Toxins

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Magnetic molecularly imprinted polymers (MMIPs) have fused molecular imprinting technology with magnetic separation technology, emerging as an innovative material capable of recognizing specific molecules and efficiently separating target substances. Their application to the extraction and purification of mycotoxins has great potential, due to the toxicity and economic impact of these contaminants. In this work, MMIP has been proposed as a sample treatment for the determination of main four aflatoxins (B1, B2, G1 and G2) in pig feed. The MMIP was formed through the integration of magnetic material (Fe3O4) with commercial molecularly imprinted polymers, avoiding the synthesis step and, therefore, simplifying the process. The analyses were carried out by high-performance liquid chromatography with fluorescence detection and the method was validated and limits of quantification (LOQs) between 0.09 and 0.47 ng/g were obtained, below the allowed or recommended levels by the European Union. Repeatability and intermediate precision showed relative standard deviations lower than 10% in all cases and trueness ranged from 92 to 111%. Finally, the proposed method was applied to 31 real pig feed samples, detecting aflatoxins with concentrations between 0.2 and 3.2 ng/g.

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“…Traditional techniques for determining tea type, origin, quality, and authenticity primarily rely on stable isotope, mineral element analysis, chromatography, and near-infrared spectroscopy. , However, they face drawbacks including susceptibility to pesticides and contaminants, intricate pretreatment, costly equipment, specialized personnel, and low sensitivity, constraining their broad use. − Cross-responsive optical sensor arrays developed based on the taste system of animals offer unique advantages for detecting multiple targets and mixtures. − These arrays are simple to construct, sensitive, and widely used in food detection. − Our group has been engaged in the development of fluorescent sensor arrays for multiobject detection, such as whiskies, wines, , juices, etc.…”

Section: Introductionmentioning

confidence: 99%

Multilocus Distance-Regulated Sensor Array for Recognition of Polyphenols via Machine Learning and Indicator Displacement Assay

Ni,

Yu,

Gao

et al. 2023

Anal. Chem.

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Developing new strategies to construct sensor arrays that can effectively distinguish multiple natural components with similar structures in mixtures is an exceptionally challenging task. Here, we propose a new multilocus distance-modulated indicator displacement assay (IDA) strategy for constructing a sensor array, incorporating machine learning optimization to identify polyphenols. An 8-element array, comprising two fluorophores and their six dynamic covalent complexes (C1−C6) formed by pairing two fluorophores with three distinct distance-regulated quenchers, has been constructed. Polyphenols with diverse spatial arrangements and combinatorial forms compete with the fluorophores by forming pseudocycles with quenchers within the complexes, leading to varying degrees of fluorescence recovery. The array accurately and effectively distinguished four tea polyphenols and 16 tea varieties, thereby demonstrating the broad applicability of the multilocus distance-modulated IDA array in detecting polyhydroxy foods and natural medicines.

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Recent advances in magnetic molecularly imprinted polymers and their application in the food safety analysis

Cited by 15 publications

References 135 publications

Enhancement in Sensitivity and Selectivity of Electrochemical Technique with CuO/g-C3N4 Nanocomposite Combined with Molecularly Imprinted Polymer for Melamine Detection

Enhancement in Sensitivity and Selectivity of Electrochemical Technique with CuO/g-C3N4 Nanocomposite Combined with Molecularly Imprinted Polymer for Melamine Detection

Magnetic Molecularly Imprinted Polymers for Selective Extraction of Aflatoxins from Feeds

Multilocus Distance-Regulated Sensor Array for Recognition of Polyphenols via Machine Learning and Indicator Displacement Assay

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