Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples
Magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub>) functionalized with graphene oxide (GO) have been synthesized through a silanization process of the magnetic nanoparticles with tetraethyl orthosilicate and (3-aminopropyl)triethoxysilane and further coupling of GO. The sy...
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doaj-65eea54008024542b8893e524cd861122020-11-25T02:05:45ZengMDPI AGNanomaterials2079-49912020-01-0110116810.3390/nano10010168nano10010168Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water SamplesAlejandro Medina0Francisco Antonio Casado-Carmona1Ángela I. López-Lorente2Soledad Cárdenas3Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainDepartamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainDepartamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainDepartamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUNAN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie, E-14071 Córdoba, SpainMagnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub>) functionalized with graphene oxide (GO) have been synthesized through a silanization process of the magnetic nanoparticles with tetraethyl orthosilicate and (3-aminopropyl)triethoxysilane and further coupling of GO. The synthesized nanomaterials have been characterized by several techniques, such as transmission electron microscopy (TEM), and infrared and Raman spectroscopy, which enabled the evaluation of the different steps of the functionalization process. The hybrid nanomaterial has been employed for the extraction of five benzophenones (benzophenone-1, benzophenone-3, 4-hydroxybenzophenone, benzophenone-6 and benzophenone-8) in aqueous samples by dispersive micro-solid phase extraction, combining the magnetic properties of magnetite nanoparticles with the excellent sorption capacity of graphene oxide via hydrophobic interactions with the analytes. The subsequent separation and quantification of the analytes was performed by liquid chromatography with tandem mass spectrometric detection, achieving limits of detection (LODs) in the range 2.5 to 8.2 μg·L<sup>−1</sup>, with relative standard deviations ranging from 1.3−9.8% and relative recovering in the range 86 to 105%. Positive swimming pool water samples analysed following the developed method revealed the presence of benzophenones in from 14.3 to 39 μg·L<sup>−1</sup>.https://www.mdpi.com/2079-4991/10/1/168dispersive micro-solid phase microextractionbenzophenonesmagnetic nanoparticlesgraphene oxideswimming pool water |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Alejandro Medina Francisco Antonio Casado-Carmona Ángela I. López-Lorente Soledad Cárdenas |
spellingShingle |
Alejandro Medina Francisco Antonio Casado-Carmona Ángela I. López-Lorente Soledad Cárdenas Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples Nanomaterials dispersive micro-solid phase microextraction benzophenones magnetic nanoparticles graphene oxide swimming pool water |
author_facet |
Alejandro Medina Francisco Antonio Casado-Carmona Ángela I. López-Lorente Soledad Cárdenas |
author_sort |
Alejandro Medina |
title |
Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples |
title_short |
Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples |
title_full |
Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples |
title_fullStr |
Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples |
title_full_unstemmed |
Magnetic Graphene Oxide Composite for the Microextraction and Determination of Benzophenones in Water Samples |
title_sort |
magnetic graphene oxide composite for the microextraction and determination of benzophenones in water samples |
publisher |
MDPI AG |
series |
Nanomaterials |
issn |
2079-4991 |
publishDate |
2020-01-01 |
description |
Magnetite nanoparticles (Fe<sub>3</sub>O<sub>4</sub>) functionalized with graphene oxide (GO) have been synthesized through a silanization process of the magnetic nanoparticles with tetraethyl orthosilicate and (3-aminopropyl)triethoxysilane and further coupling of GO. The synthesized nanomaterials have been characterized by several techniques, such as transmission electron microscopy (TEM), and infrared and Raman spectroscopy, which enabled the evaluation of the different steps of the functionalization process. The hybrid nanomaterial has been employed for the extraction of five benzophenones (benzophenone-1, benzophenone-3, 4-hydroxybenzophenone, benzophenone-6 and benzophenone-8) in aqueous samples by dispersive micro-solid phase extraction, combining the magnetic properties of magnetite nanoparticles with the excellent sorption capacity of graphene oxide via hydrophobic interactions with the analytes. The subsequent separation and quantification of the analytes was performed by liquid chromatography with tandem mass spectrometric detection, achieving limits of detection (LODs) in the range 2.5 to 8.2 μg·L<sup>−1</sup>, with relative standard deviations ranging from 1.3−9.8% and relative recovering in the range 86 to 105%. Positive swimming pool water samples analysed following the developed method revealed the presence of benzophenones in from 14.3 to 39 μg·L<sup>−1</sup>. |
topic |
dispersive micro-solid phase microextraction benzophenones magnetic nanoparticles graphene oxide swimming pool water |
url |
https://www.mdpi.com/2079-4991/10/1/168 |
work_keys_str_mv |
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