Magnetic molecularly imprinted polymers for the detection of aminopyralid in milk using dispersive solid-phase extraction

He, Yahui; Tan, Sijia; EI-Aty, A.M. Abd; Hacımüftüoğlu, Ahmet; She, Yongxin

doi:10.1039/c9ra05782j

Cited by 25 publications

(19 citation statements)

References 28 publications

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“…The Scatchard equation is a commonly used analytical method to analyze the binding properties of MIPs. The Scatchard equation formula is as follows [ 31 ]:

where Q m (mg/g) is the maximum adsorption capacity of the binding site and K d (mg/L) is the dissociation constant of the binding site.…”

Section: Resultsmentioning

confidence: 99%

Novel Dual-Signal SiO2-COOH@MIPs Electrochemical Sensor for Highly Sensitive Detection of Chloramphenicol in Milk

Geng

Liu

Huang

et al. 2023

Sensors

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In view of the great threat of chloramphenicol (CAP) to human health and the fact that a few producers have illegally used CAP in the food production process to seek economic benefits in disregard of laws and regulations and consumer health, we urgently need a detection method with convenient operation, rapid response, and high sensitivity capabilities to detect CAP in food to ensure people’s health. Herein, a molecularly imprinted polymer (MIP) electrochemical sensor based on a dual-signal strategy was designed for the highly sensitive analysis of CAP in milk. The NiFe Prussian blue analog (NiFe-PBA) and SnS2 nanoflowers were modified successively on the electrode surface to obtain dual signals from [Fe(CN)6]3−/4− at 0.2V and NiFe-PBA at 0.5 V. SiO2-COOH@MIPs that could specifically recognize CAP were synthesized via thermal polymerization using carboxylated silica microspheres (SiO2-COOH) as carriers. When the CAP was adsorbed by SiO2-COOH@MIPs, the above two oxidation peak currents decreased at the same time, allowing the double-signal analysis. The SiO2-COOH@MIPs/SnS2/NiFe-PBA/GCE sensor used for determining CAP was successfully prepared. The sensor utilized the interactions of various nanomaterials to achieve high-sensitivity dual-signal detection, which had certain innovative significance. At the same time, the MIPs were synthesized using a surface molecular imprinting technology, which could omit the time of polymerization and elution and met the requirements for rapid detection. After optimizing the experimental conditions, the detection range of the sensor was 10−8 g/L–10−2 g/L and the limit of detection reached 3.3 × 10−9 g/L (S/N = 3). The sensor had satisfactory specificity, reproducibility, and stability, and was successfully applied to the detection of real milk samples.

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“…The Scatchard equation is a commonly used analytical method to analyze the binding properties of MIPs. The Scatchard equation formula is as follows [ 31 ]:

where Q m (mg/g) is the maximum adsorption capacity of the binding site and K d (mg/L) is the dissociation constant of the binding site.…”

Section: Resultsmentioning

confidence: 99%

Novel Dual-Signal SiO2-COOH@MIPs Electrochemical Sensor for Highly Sensitive Detection of Chloramphenicol in Milk

Geng

Liu

Huang

et al. 2023

Sensors

View full text Add to dashboard Cite

show abstract

“…On other occasions, the monomer, such as methacryloyl chloride, can be fixed to the functionalized silica layer after reaction with the immobilized amino groups [125]. In addition, previously modified Fe 3 O 4 with TEOS (Fe 3 O 4 @SiO 2 ) can be then covered with APTES for promoting the presence of −NH 2 groups [105,[120][121][122][123].…”

Section: Surface Functionalization With Silica-based Reagentsmentioning

confidence: 99%

“…Introduction of carboxyl groups onto the Fe 3 O 4 @SiO 2 surface is performed by treating functionalized Fe 3 O 4 @-SiO 2 -NH 2 nanoparticles (TEOS and APTES covering) with poly(ethylene glycol)bis(carboxymethyl) ether before MIP synthesis [123]. Comparison between Fe 3 O 4 @SiO 2 -COOH@MIP and Fe 3 O 4 @-SiO 2 -NH 2 @MIP showed that the latter had high specific surface area and fast mass transfer rate toward the target (aminopyralid) [123].…”

Section: Surface Functionalization With Silica-based Reagentsmentioning

confidence: 99%

Molecularly Imprinted Polymers for Dispersive (Micro)Solid Phase Extraction: A Review

Jayasinghe

Moreda-Piñeiro

2021

Separations

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The review describes the development of batch solid phase extraction procedures based on dispersive (micro)solid phase extraction with molecularly imprinted polymers (MIPs) and magnetic MIPs (MMIPs). Advantages and disadvantages of the various MIPs for dispersive solid phase extraction and dispersive (micro)solid phase extraction are discussed. In addition, an effort has also been made to condense the information regarding MMIPs since there are a great variety of supports (magnetite and magnetite composites with carbon nanotubes, graphene oxide, or organic metal framework) and magnetite surface functionalization mechanisms for enhancing MIP synthesis, including reversible addition−fragmentation chain-transfer (RAFT) polymerization. Finally, drawbacks and future prospects for improving molecularly imprinted (micro)solid phase extraction (MIMSPE) are also appraised.

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“…APTES) or polymerizable double bonds (e.g. MPTMS), for the subsequent polymer grafting 17 . The resulting composites are then often dispersed in an organic solvent where an imprinted layer is obtained either by free-radical of more frequently reversible deactivation radical polymerisation (RDRP).…”

Section: Introductionmentioning

confidence: 99%

An easy synthesis of small, stable and water-compatible superparamagnetic protein-specific molecularly imprinted nanoparticles

Griffete

Michot

Gonzato

2022

Polymer

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Magnetic molecularly imprinted polymers for the detection of aminopyralid in milk using dispersive solid-phase extraction

Abstract: (a) Preparation of Fe3O4@SiO2–NH2@MMIP. (b) Diagram of magnetic molecularly imprinted polymers for the detection of aminopyralid in milk using dispersive solid-phase extraction.

Cited by 25 publications

References 28 publications

Novel Dual-Signal SiO2-COOH@MIPs Electrochemical Sensor for Highly Sensitive Detection of Chloramphenicol in Milk

Novel Dual-Signal SiO2-COOH@MIPs Electrochemical Sensor for Highly Sensitive Detection of Chloramphenicol in Milk

Molecularly Imprinted Polymers for Dispersive (Micro)Solid Phase Extraction: A Review

An easy synthesis of small, stable and water-compatible superparamagnetic protein-specific molecularly imprinted nanoparticles

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