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Molecules 2018, 23(6), 1252; https://doi.org/10.3390/molecules23061252

Carbon Nanohorn Suprastructures on a Paper Support as a Sorptive Phase

Departamento de Química Analítica, Instituto Universitario de Investigación en Química Fina y Nanoquímica IUIQFN, Universidad de Córdoba, Campus de Rabanales, Edificio Marie Curie (anexo), E-14071 Córdoba, Spain
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Academic Editor: Victoria F. Samanidou
Received: 3 May 2018 / Revised: 21 May 2018 / Accepted: 22 May 2018 / Published: 24 May 2018
(This article belongs to the Special Issue Solid Phase Extraction: State of the Art and Future Perspectives)
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Abstract

This article describes a method for the modification of paper with single-wall carbon nanohorns (SWCNHs) to form stable suprastructures. The SWCNHs form stable dahlia-like aggregates in solution that are then self-assembled into superior structures if the solvent is evaporated. Dipping paper sections into a dispersion of SWCNHs leads to the formation of a thin film that can be used for microextraction purposes. The coated paper can be easily handled with a simple pipette tip, paving the way for disposable extraction units. As a proof of concept, the extraction of antidepressants from urine and their determination by direct infusion mass spectrometry is studied. Limits of detection (LODs) were 10 ng/L for desipramine, amitriptyline, and mianserin, while the precision, expressed as a relative standard deviation, was 7.2%, 7.3%, and 9.8%, respectively. View Full-Text
Keywords: carbon nanohorns; sorptive phase; paper; microextraction; antidepressants carbon nanohorns; sorptive phase; paper; microextraction; antidepressants
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Ríos-Gómez, J.; Fresco-Cala, B.; García-Valverde, M.T.; Lucena, R.; Cárdenas, S. Carbon Nanohorn Suprastructures on a Paper Support as a Sorptive Phase. Molecules 2018, 23, 1252.

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