1. Carbon Nanohorn Suprastructures on a Paper Support as a Sorptive Phase.
- Author
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Ríos-Gómez, Julia, Fresco-Cala, Beatriz, García-Valverde, María Teresa, Lucena, Rafael, Cárdenas, Soledad, and Samanidou, Victoria F.
- Subjects
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CARBON nanohorns , *DESIPRAMINE , *ANTIDEPRESSANTS , *EXTRACTION (Chemistry) , *MASS spectrometry , *CHEMICAL reactions , *MIANSERIN - 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. [ABSTRACT FROM AUTHOR]
- Published
- 2018
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