Synthesis and electrochemical characterization of nanostructured magnetic molecularly imprinted polymers for 17-β-Estradiol determination
| Autor: | Abd Almonam Baleg, Abdellatif Ait Lahcen, Priscilia Baker, Emmanuel I. Iwuoha, Aziz Amine |
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| Rok vydání: | 2017 |
| Předmět: |
Materials science
Scanning electron microscope 010401 analytical chemistry Metals and Alloys Analytical chemistry Molecularly imprinted polymer Infrared spectroscopy 02 engineering and technology 021001 nanoscience & nanotechnology Condensed Matter Physics Electrochemistry 01 natural sciences 0104 chemical sciences Surfaces Coatings and Films Electronic Optical and Magnetic Materials Dielectric spectroscopy Materials Chemistry Magnetic nanoparticles Electrical and Electronic Engineering Cyclic voltammetry 0210 nano-technology High-resolution transmission electron microscopy Instrumentation |
| Zdroj: | Sensors and Actuators B: Chemical. 241:698-705 |
| ISSN: | 0925-4005 |
| Popis: | The authors report the synthesis, characterization and electrochemical study of a nanostructured magnetic molecularly imprinted polymer (Fe 3 O 4 -MIP) for the determination of 17-β-Estradiol (17-β-E2). The synthesized magnetic nanoparticles (Fe 3 O 4 -NPs) and Fe 3 O 4 -MIP were investigated using High Resolution Transmission Electron Microscopy (HRTEM), High Resolution Scanning Electron Microscopy (HRSEM), X-Ray Diffraction (XRD) and Fourrier Transform Infrared spectroscopy (FT-IR) as characterization techniques. The electrochemical characterization was studied by cyclic voltammetry and electrochemical impedance spectroscopy Several important parameters controlling the performance of the Fe 3 O 4 -MIP based sensor such as the choice of electrochemical analysis technique, the frequency, the effect of pH and the incubation time were investigated. Under the optimal conditions, the oxidation peak current was linearly related to 17-β-E2 concentration in the range of 0.05–10 μM. The Fe 3 O 4 -MIP based sensor amplifies the oxidation current in square-wave voltammetric measurements which allows reaching 20 nM as detection limit. Furthermore, the Fe 3 O 4 -MIP sensing system exhibits a high selectivity towards 17-β-E2 and was applied successfully for its determination in river water samples. |
| Databáze: | OpenAIRE |
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