Molecularly imprinted magnetic nanoparticles for the micro solid-phase extraction of thiabendazole from citrus samples
The preparation of molecularly imprinted core–shell magnetic nanoparticles and their subsequent use in the solid-phase extraction of thiabendazole from citrus sample extracts is described. Molecularly imprinted core–shell magnetic nanoparticles were prepared by the precipitation copolymerization of the imprinting polymerization mix_x0002_ture on the surface of vinyl-modified silica magnetic nanoparticles and were charac_x0002_terized by Fourier transform infrared spectroscopy and scanning electron microscopy. The obtained molecularly imprinted core–shell magnetic nanoparticles exhibited a high selectivity for thiabendazole and were easily collected and separated by an exter_x0002_nal magnetic field without additional centrifugation or filtration steps. Under opti_x0002_mum conditions, a magnetic molecularly imprinted solid-phase extraction method was developed allowing the extraction of thiabendazole from citrus sample extracts and final determination by high-performance liquid chromatography with fluores_x0002_cence detection. The detection limit was 0.2 mg/kg, far lower than the maximum residue limit established within the European Union for thiabendazole in citrus samples.
| Main Authors: | , , |
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| Format: | artículo biblioteca |
| Language: | English |
| Published: |
Wiley
2017
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| Subjects: | Citrus samples, Magnetic nanoparticles, Molecular imprinting, Thiabendazole, |
| Online Access: | http://hdl.handle.net/20.500.12792/1592 http://hdl.handle.net/10261/290436 |
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| Summary: | The preparation of molecularly imprinted core–shell magnetic nanoparticles and their subsequent use in the solid-phase extraction of thiabendazole from citrus sample extracts is described. Molecularly imprinted core–shell magnetic nanoparticles were prepared by the precipitation copolymerization of the imprinting polymerization mix_x0002_ture on the surface of vinyl-modified silica magnetic nanoparticles and were charac_x0002_terized by Fourier transform infrared spectroscopy and scanning electron microscopy. The obtained molecularly imprinted core–shell magnetic nanoparticles exhibited a high selectivity for thiabendazole and were easily collected and separated by an exter_x0002_nal magnetic field without additional centrifugation or filtration steps. Under opti_x0002_mum conditions, a magnetic molecularly imprinted solid-phase extraction method was developed allowing the extraction of thiabendazole from citrus sample extracts and final determination by high-performance liquid chromatography with fluores_x0002_cence detection. The detection limit was 0.2 mg/kg, far lower than the maximum residue limit established within the European Union for thiabendazole in citrus samples. |
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