Graphene oxide/Fe3O4 as sorbent for magnetic solid-phase extraction coupled with liquid chromatography to determine 2,4,6-trinitrotoluene in water samples

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Title: Graphene oxide/Fe3O4 as sorbent for magnetic solid-phase extraction coupled with liquid chromatography to determine 2,4,6-trinitrotoluene in water samples
Authors: Costa dos Reis, Luciana | Vidal, Lorena | Canals, Antonio
Research Group/s: Espectroscopía Atómica-Masas y Química Analítica en Condiciones Extremas
Center, Department or Service: Universidad de Alicante. Departamento de Química Analítica, Nutrición y Bromatología | Universidad de Alicante. Instituto Universitario de Materiales
Keywords: Graphene oxide/Fe3O4 nanocomposite | Liquid chromatography-UV-Vis | Magnetic solid-phase extraction | 2,4,6-Trinitrotoluene | Water samples
Knowledge Area: Química Analítica
Issue Date: Apr-2017
Publisher: Springer Berlin Heidelberg
Citation: Analytical and Bioanalytical Chemistry. 2017, 409(10): 2665-2674. doi:10.1007/s00216-017-0211-3
Abstract: A fast, simple, economical, and environmentally friendly magnetic solid-phase extraction (MSPE) procedure has been developed to preconcentrate 2,4,6-trinitrotoluene (TNT) from water samples prior to determination by liquid chromatography-UV-Vis employing graphene oxide/Fe3O4 nanocomposite as sorbent. The nanocomposite synthesis was investigated, and the MSPE was optimized by a multivariate approach. The optimum MSPE conditions were 40 mg of nanocomposite, 10 min of vortex extraction, 1 mL of acetonitrile as eluent, and 6 min of desorption in an ultrasonic bath. Under the optimized experimental conditions, the method was evaluated to obtain a preconcentration factor of 153. The linearity of the method was studied from 1 to 100 μg L−1 (N = 5), obtaining a correlation coefficient of 0.994. The relative standard deviation and limit of detection were found to be 12% (n = 6, 10 μg L−1) and 0.3 μg L−1, respectively. The applicability of the method was investigated, analyzing three types of water samples (i.e., reservoir and drinking water and effluent wastewater) and recovery values ranged between 87 and 120% (50 μg L−1 spiking level), showing that the matrix had a negligible effect upon extraction. Finally, the semiquantitative Eco-Scale metrics confirmed the greenness of the developed method.
Sponsor: The authors would like to thank the Ministry of Science and Innovation of Spain (project no. CTQ2011-23968) for the financial support and L. Costa thanks the Capes Foundation within the Ministry of Education in Brazil (Process 12013/13-7).
ISSN: 1618-2642 (Print) | 1618-2650 (Online)
DOI: 10.1007/s00216-017-0211-3
Language: eng
Type: info:eu-repo/semantics/article
Rights: © Springer-Verlag Berlin Heidelberg 2017. The final publication is available at Springer via
Peer Review: si
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Appears in Collections:INV - SP-BG - Artículos de Revistas

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