Carbon Nanohorn Suprastructures on a Paper Support as a Sorptive Phase
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Author
Ríos Gómez, Julia
Fresco-Cala, B.
García-Valverde, María Teresa
Lucena, Rafael
Cárdenas, Soledad
Publisher
MDPIDate
2018Subject
carbon nanohornsSorptive phase
Paper
Microextraction
Antidepressants
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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