Molecularly imprinted polymer-based optical sensors for pesticides in foods: Recent advances and future trends

Fang, Ling; Jia, Mingxuan; Zhao, Huimin; Kang, Linzhi; Shi, Linchun; Zhou, Lidong; Kong, Weijun

doi:10.1016/j.tifs.2021.07.039

Cited by 101 publications

(28 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Molecularly imprinted polymers (MIPs) are synthetic receptors and selective adsorbents used for the preconcentration, separation and determination of various organic compounds especially in food, biological and environmental samples (Fang, 2021;Azizi and Bottaro, 2020). A growing number of researchers pay attention to use MIPs in various studies due to their selectivity, cheapness, chemical and thermal stability, reusability and mechanical strength (El-Schich, 2020;Liu, 2019).…”

Section: öZmentioning

confidence: 99%

Preconcentration and Fluorimetric Determination of 2-Phenylphenol using Magnetic Molecularly Imprinted Polymer

ILKTAC

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

View full text Add to dashboard Cite

In the present work, reusable magnetic molecularly imprinted polymers have been used for the first time as an adsorbent for the determination of 2-phenylphenol. Magnetic molecularly imprinted polymers have been used for the selective separation and preconcentration of 2-phenylphenol and native fluorescence has been used for the sensitive determination of the analyte. The developed method is rapid and determination of 2-phenylphenol was completed in 40 minutes. Limit of detection (LOD) of the method was found to be 1.09 µg L-1 and the imprinting factor was found to be 1.87. Capacities of the imprinted and non-imprinted polymers were calculated as 0.0494 μmol g−1 and 0.0265 μmol g−1 which indicates the creation of the specific binding sites on the surface of the imprinted polymer. The linearity of the calibration graph was observed within the range of 5 -250 µg L-1. Selectivity parameters showed that the specific binding sites were available on the imprinted polymer which was capable of recognizing 2-phenylphenol molecules with their functional groups, size and shape. Scatchard analysis revealed the heterogeneous distribution of binding sites for imprinted polymer and homogeneous binding site for non-imprinted polymer. Quantitative re-binding (99.0±0.7) and recovery (98.8±0.8) values were obtained when the same imprinted polymer was used for ten times. The interference effects of some organic compounds and characterization studies were also evaluated. Relative standard deviations of intra-day and inter-day studies were found to be in the range of 1.1 -1.5 % and 1.1 -1.8 %, respectively. The method is applied to tap water samples and the recoveries were found to be in the range of 95.3 and 99.7 %.

show abstract

Section: öZmentioning

confidence: 99%

Preconcentration and Fluorimetric Determination of 2-Phenylphenol using Magnetic Molecularly Imprinted Polymer

ILKTAC

2022

Erzincan Üniversitesi Fen Bilimleri Enstitüsü Dergisi

View full text Add to dashboard Cite

show abstract

“…MIPs are synthetic receptors capable of selectively binding to a target through a “lock and key” mechanism and, as such, are considered synthetic substitutes of natural antibodies [ 21 ]. MIPs have been extensively studied in the last decades, and their high application potential in food safety and clinical diagnostics [ 22 , 23 , 24 , 25 ] is primarily due to the advantages over their natural counterparts in terms of chemical and environmental stability, straightforward preparation, and cost-effectiveness [ 26 , 27 ]. These features make MIPs ideal candidates for the recognition of different molecules and biomarkers in complex matrices [ 28 , 29 , 30 ].…”

Section: Introductionmentioning

confidence: 99%

A Molecularly Imprinted Polymer-Based Thermal Sensor for the Selective Detection of Melamine in Milk Samples

Caldara

Lowdon

Royakkers

et al. 2022

Foods

View full text Add to dashboard Cite

In recent years, melamine-sensing technologies have increasingly gained attention, mainly due to the misuse of the molecule as an adulterant in milk and other foods. Molecularly imprinted polymers (MIPs) are ideal candidates for the recognition of melamine in real-life samples. The prepared MIP particles were incorporated into a thermally conductive layer via micro-contact deposition and its response towards melamine was analyzed using the heat-transfer method (HTM). The sensor displayed an excellent selectivity when analyzing the thermal response to other chemicals commonly found in foods, and its applicability in food safety was demonstrated after evaluation in untreated milk samples, demonstrating a limit of detection of 6.02 μM. As the EU/US melamine legal limit in milk of 2.5 mg/kg falls within the linear range of the sensor, it can offer an innovative solution for routine screening of milk samples in order to detect adulteration with melamine. The results shown in this work thus demonstrate the great potential of a low-cost thermal platform for the detection of food adulteration in complex matrices.

show abstract

“…As a kind of novel technology with good selectivity, anti-interference ability, as well as low cost and ease of synthesis, molecularly imprinted polymers (MIPs) have been attracting more and more attention [11]. However, MIPs also have some inevitable shortcomings, such as the varying degrees of template molecular residues, weak binding force, slow mass transfer rate and so on, which hampers the widespread adoption of MIPs [12].…”

Section: Introductionmentioning

confidence: 99%

Rapid Detection of Dimethoate in Soybean Samples by Microfluidic Paper Chips Based on Oil-Soluble CdSe Quantum Dots

Yan

Zhang

et al. 2021

Foods

View full text Add to dashboard Cite

Given the imperative of monitoring organophosphorus pesticides (OPs) residues in the ecosystem, here a novel, facile and sensitive fluorescence sensor is presented for the rapid detection of dimethoate. In this work, surface molecularly imprinted polymer (SMIP) and microfluidic technology had been introduced to enhance the selectivity and portability of the described methodology. Oil-soluble CdSe quantum dots (QDs) synthesized in a green way were used as fluorescent material for the selective detection of dimethoate on the basis of static quenching and photoinduced electron transfer mechanism. Among many kinds of paper materials, glass fiber paper was used as the novel substrate of paper chip due to low pristine fluorescence and better performance when combining CdSe QDs. In the process of molecular imprinting, the interaction between several functional monomers and dimethoate molecule was investigated and simulated theoretically by software to improve the selectivity of the sensor. Consequently, the fabricated novel detection platform could effectively respond to dimethoate in 10 min with the concentration range of 0.45–80 μmol/L and detection limit of 0.13 μmol/L. The recovery in the spiked experiment soybean sample was in an acceptable range (97.6–104.1%) and the accuracy was verified by gas chromatography-mass spectrometry, which signified the feasibility and potential in food sampling.

show abstract

Molecularly imprinted polymer-based optical sensors for pesticides in foods: Recent advances and future trends

Cited by 101 publications

References 107 publications

Preconcentration and Fluorimetric Determination of 2-Phenylphenol using Magnetic Molecularly Imprinted Polymer

Preconcentration and Fluorimetric Determination of 2-Phenylphenol using Magnetic Molecularly Imprinted Polymer

A Molecularly Imprinted Polymer-Based Thermal Sensor for the Selective Detection of Melamine in Milk Samples

Rapid Detection of Dimethoate in Soybean Samples by Microfluidic Paper Chips Based on Oil-Soluble CdSe Quantum Dots

Contact Info

Product

Resources

About