scholarly journals An integrated carbon entrapped molecularly imprinted polymer (MIP) electrode for voltammetric detection of resveratrol in wine

2015 ◽  
Vol 7 (21) ◽  
pp. 9092-9099 ◽  
Author(s):  
S. M. Mugo ◽  
B. J. Edmunds ◽  
D. J. Berg ◽  
N. K. Gill
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Voltammetric Detection ◽  
Mip Sensor

Depiction of a voltammetric MIP sensor for resveratrol analysis in wine.

scholarly journals Redesigning an Electrochemical MIP Sensor for PFOS: Practicalities and Pitfalls

Sensors ◽  
2019 ◽  
Vol 19 (20) ◽  
pp. 4433 ◽  
Author(s):  
Giulia Moro ◽  
Davide Cristofori ◽  
Fabio Bottari ◽  
Elti Cattaruzza ◽  
Karolien De Wael ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Electrochemical Sensors ◽  
Differential Pulse ◽  
Complete Characterization ◽  
In Situ Monitoring ◽  
Template Molecule ◽  
Imprinted Polymer ◽  
Heterogeneous Distribution ◽  
Molecularly Imprinted ◽  
Mip Sensor

There is a growing interest in the technological transfer of highly performing electrochemical sensors within portable analytical devices for the in situ monitoring of environmental contaminants, such as perfluorooctanesulfonic acid (PFOS). In the redesign of biomimetic sensors, many parameters should be taken into account from the working conditions to the electrode surface roughness. A complete characterization of the surface modifiers can help to avoid time-consuming optimizations and better interpret the sensor responses. In the present study, a molecularly imprinted polymer electrochemical sensor (MIP) for PFOS optimized on gold disk electrodes was redesigned on commercial gold screen-printed electrodes. However, its performance investigated by differential pulse voltammetry was found to be poor. Before proceeding with further optimization, a morphological study of the bare and modified electrode surfaces was carried out by scanning electron microscopy–energy-dispersive X-ray spectrometry (SEM–EDS), atomic force microscopy (AFM) and profilometry revealing an heterogeneous distribution of the polymer strongly influenced by the electrode roughness. The high content of fluorine of the target-template molecule allowed to map the distribution of the molecularly imprinted polymer before the template removal and to define a characterization protocol. This case study shows the importance of a multi-analytical characterization approach and identify significant parameters to be considered in similar redesigning studies.

scholarly journals Electrochemical Sensor Based on Molecularly Imprinted Polymer for the Detection of Cefalexin

Biosensors ◽  
2019 ◽  
Vol 9 (1) ◽  
pp. 31 ◽  
Author(s):  
Bogdan Feier ◽  
Adrian Blidar ◽  
Alexandra Pusta ◽  
Paula Carciuc ◽  
Cecilia Cristea
Keyword(s):  
Electrochemical Sensor ◽  
Molecularly Imprinted Polymer ◽  
Electrochemical Impedance ◽  
Limit Of Detection ◽  
Imprinted Polymer ◽  
Boron Doped Diamond ◽  
Molecularly Imprinted ◽  
Diamond Electrode ◽  
The Difference ◽  
Mip Sensor

In this study, a new electrochemical sensor was developed for the detection of cefalexin (CFX), based on the use of a molecularly imprinted polymer (MIP) obtained by electro‒polymerization in an aqueous medium of indole-3-acetic acid (I3AA) on a glassy carbon electrode (GCE) and on boron-doped diamond electrode (BDDE). The two different electrodes were used in order to assess how their structural differences and the difference in the potential applied during electrogeneration of the MIP translate to the performances of the MIP sensor. The quantification of CFX was performed by using the electrochemical signal of a redox probe before and after the rebinding of the template. The modified electrode was characterized using atomic force microscopy (AFM), scanning electron microscopy (SEM), cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). The influence of different parameters on the fabrication of the sensor was tested, and the optimized method presented high selectivity and sensitivity. The MIP-based electrode presented a linear response for CFX concentration range of 10 to 1000 nM, and a limit of detection of 3.2 nM and 4.9 nM was obtained for the BDDE and the GCE, respectively. The activity of the sensor was successfully tested in the presence of some other cephalosporins and of other pharmaceutical compounds. The developed method was successfully applied to the detection of cefalexin from real environmental and pharmaceutical samples.

scholarly journals SPR-Optical Fiber-Molecularly Imprinted Polymer Sensor for the Detection of Furfural in Wine

Biosensors ◽  
2021 ◽  
Vol 11 (3) ◽  
pp. 72
Author(s):  
Maria Pesavento ◽  
Luigi Zeni ◽  
Letizia De Maria ◽  
Giancarla Alberti ◽  
Nunzio Cennamo
Keyword(s):  
Optical Fiber ◽  
Molecularly Imprinted Polymer ◽  
Real Life ◽  
Human Beings ◽  
Imprinted Polymer ◽  
Carcinogenic Effect ◽  
Molecularly Imprinted ◽  
Fermented Beverages ◽  
Practical Applications ◽  
Mip Sensor

A surface plasmon resonance (SPR) platform, based on a D-shaped plastic optical fiber (POF), combined with a biomimetic receptor, i.e., a molecularly imprinted polymer (MIP), is proposed to detect furfural (2-furaldheide, 2-FAL) in fermented beverages like wine. MIPs have been demonstrated to be a very convenient biomimetic receptor in the proposed sensing device, being easy and rapid to develop, suitable for on-site determinations at low concentrations, and cheap. Moreover, the MIP film thickness can be changed to modulate the sensing parameters. The possibility of performing single drop measurements is a further favorable aspect for practical applications. For example, the use of an SPR-MIP sensor for the analysis of 2-FAL in a real life matrix such as wine is proposed, obtaining a low detection limit of 0.004 mg L−1. The determination of 2-FAL in fermented beverages is becoming a crucial task, mainly for the effects of the furanic compounds on the flavor of food and their toxic and carcinogenic effect on human beings.

scholarly journals An Electrochemical Sensor for Diphenylamine Detection Based on Reduced Graphene Oxide/Fe3O4-Molecularly Imprinted Polymer with 1,4-Butanediyl-3,3’-bis-l-vinylimidazolium Dihexafluorophosphate Ionic Liquid as Cross-Linker

Polymers ◽  
2018 ◽  
Vol 10 (12) ◽  
pp. 1329 ◽  
Author(s):  
Lingyu Liu ◽  
Xudong Zhu ◽  
Yanbo Zeng ◽  
Hailong Wang ◽  
Yixia Lu ◽  
...  
Keyword(s):  
Ionic Liquid ◽  
Graphene Oxide ◽  
Glassy Carbon ◽  
Molecularly Imprinted Polymer ◽  
Carbon Electrode ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Reduced Graphene ◽  
Cross Linker ◽  
Mip Sensor

In this paper, we report a new composite of reduced graphene oxide/Fe3O4-ionic liquid based molecularly imprinted polymer (RGO/Fe3O4-IL-MIP) fabricated for diphenylamine (DPA) detection. RGO/Fe3O4-IL-MIP was prepared with RGO/Fe3O4 as supporter, ionic liquid 1-vinyl-3-butylimidazolium hexafluorophosphate ([VC4mim][PF6]) as functional monomer, ionic liquid 1,4-butanediyl-3,3’-bis-l-vinylimidazolium dihexafluorophosphate ([V2C4(mim)2][(PF6)2]) as cross-linker, and diphenylamine (DPA) as template molecule. Fourier transform infrared spectroscopy, thermal gravimetric analysis, scanning electron microscopy, and vibrating sample magnetometer were employed to characterize the RGO/Fe3O4-IL-MIP composite. RGO/Fe3O4-IL-MIP was then drop-cast onto a glassy carbon electrode to construct an electrochemical sensor for DPA. The differential pulse voltammetry (DPV) peak current response for 20 μM DPA of RGO/Fe3O4-IL-MIP modified glassy carbon electrode (GCE) was 3.24 and 1.68 times that of RGO/Fe3O4-IL-NIP and RGO/Fe3O4-EGDMA-MIP modified GCEs, respectively, indicating the advantage of RGO/Fe3O4-IL-MIP based on ionic liquid (IL) as a cross-linker. The RGO/Fe3O4-IL-MIP sensor demonstrated good recognition for DPA. Under the optimized conditions, the RGO/Fe3O4-IL-MIP sensor exhibited a DPA detection limit of 0.05 μM (S/N = 3) with a linear range of 0.1–30 μM. Moreover, the new RGO/Fe3O4-IL-MIP based sensor detected DPA in real samples with satisfactory results.

A core–shell-structured molecularly imprinted polymer on upconverting nanoparticles for selective and sensitive fluorescence sensing of sulfamethazine

The Analyst ◽  
2015 ◽  
Vol 140 (15) ◽  
pp. 5301-5307 ◽  
Author(s):  
Jinghan Tian ◽  
Jialei Bai ◽  
Yuan Peng ◽  
Zhiwei Qie ◽  
Yufeng Zhao ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymer ◽  
High Selectivity ◽  
Binding Capacity ◽  
Fast Response ◽  
Core Shell ◽  
Imprinted Polymer ◽  
Fluorescence Sensing ◽  
Molecularly Imprinted ◽  
Mip Sensor

A core–shell-structured MIP sensor based on UCNPs which possess good binding capacity, fast response, high selectivity and specificity to SMZ is described.

Graphene and Co-polymer composite based molecularly imprinted sensor for ultratrace determination of melatonin in human biological fluids

RSC Advances ◽  
2015 ◽  
Vol 5 (50) ◽  
pp. 40444-40454 ◽  
Author(s):  
Pankaj Gupta ◽  
Rajendra N. Goyal
Keyword(s):  
Polymer Composite ◽  
Molecularly Imprinted Polymer ◽  
Biological Fluids ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
Mip Sensor

A novel molecularly imprinted polymer (MIP) sensor based on a composite of graphene (GR) and a co-polymer of 4-amino-3-hydroxy-1-naphthalenesulfonic acid (AHNSA) and melamine (MM) has been fabricated for detecting melatonin.

Electrochemical protein recognition based on macromolecular self-assembly of molecularly imprinted polymer: a new strategy to mimic antibody for label-free biosensing

2019 ◽  
Vol 7 (14) ◽  
pp. 2311-2319 ◽  
Author(s):  
Wei Zhao ◽  
Bing Li ◽  
Sheng Xu ◽  
Xuewen Huang ◽  
Jing Luo ◽  
...  
Keyword(s):  
Molecularly Imprinted Polymer ◽  
Self Assembly ◽  
Amphiphilic Copolymer ◽  
Protein Recognition ◽  
Label Free ◽  
Imprinted Polymer ◽  
Molecularly Imprinted ◽  
New Strategy ◽  
Mip Sensor

A versatile strategy, based on the use of an amphiphilic copolymer as a macromonomer, was developed for the preparation of a fully synthetic MIP sensor for protein recognition

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