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10.3390/molecules27238388
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Article

Layered Double Hydroxide/Graphene Quantum Dots as a New Sorbent for the Dispersive Solid-Phase Microextraction of Selected Benzophenones, Phenols, and Parabens

by
Theodoros Chatzimitakos
*,
Alkiviadis Vasilas
and
Constantine Stalikas
Laboratory of Analytical Chemistry, Department of Chemistry, University of Ioannina, 45110 Ioannina, Greece
*
Author to whom correspondence should be addressed.
Molecules 2022, 27(23), 8388; https://doi.org/10.3390/molecules27238388
Submission received: 19 October 2022 / Revised: 22 November 2022 / Accepted: 25 November 2022 / Published: 1 December 2022
(This article belongs to the Special Issue Carbon Nanodots for Analytical Applications)
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Abstract

In this study, the synthesis of a layered double hydroxide (LDH) composite with graphene quantum dots (GQDs) and its utilization for the development of a dispersive solid-phase extraction procedure are described. To this end, a carbonate-free Mg-Al LDH was synthesized. The development of the composite material made feasible the use of GQDs in a sample preparation procedure, while the incorporation of the GQDs in the LDH structure resulted in an 80% increase in extraction efficiency, compared to the bare LDH. As a proof of concept, the composite material was used for the development of an analytical method for the extraction, and preconcentration, of benzophenones, phenols, and parabens in lake water using high-performance liquid chromatography, coupled to a diode array detector. The analytical method exhibits low limits of quantification (0.10–1.33 μg L−1), good recoveries (92–100%), and satisfactory enrichment factors (169–186). Due to the abovementioned merits, the easy synthesis and simple extraction, the developed method can be used for the routine analysis of the target compounds.
Keywords: layered double hydroxides; graphene quantum dots; sample preparation; benzophenones; phenols; parabens; HPLC layered double hydroxides; graphene quantum dots; sample preparation; benzophenones; phenols; parabens; HPLC

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MDPI and ACS Style

Chatzimitakos, T.; Vasilas, A.; Stalikas, C. Layered Double Hydroxide/Graphene Quantum Dots as a New Sorbent for the Dispersive Solid-Phase Microextraction of Selected Benzophenones, Phenols, and Parabens. Molecules 2022, 27, 8388. https://doi.org/10.3390/molecules27238388

AMA Style

Chatzimitakos T, Vasilas A, Stalikas C. Layered Double Hydroxide/Graphene Quantum Dots as a New Sorbent for the Dispersive Solid-Phase Microextraction of Selected Benzophenones, Phenols, and Parabens. Molecules. 2022; 27(23):8388. https://doi.org/10.3390/molecules27238388

Chicago/Turabian Style

Chatzimitakos, Theodoros, Alkiviadis Vasilas, and Constantine Stalikas. 2022. "Layered Double Hydroxide/Graphene Quantum Dots as a New Sorbent for the Dispersive Solid-Phase Microextraction of Selected Benzophenones, Phenols, and Parabens" Molecules 27, no. 23: 8388. https://doi.org/10.3390/molecules27238388

APA Style

Chatzimitakos, T., Vasilas, A., & Stalikas, C. (2022). Layered Double Hydroxide/Graphene Quantum Dots as a New Sorbent for the Dispersive Solid-Phase Microextraction of Selected Benzophenones, Phenols, and Parabens. Molecules, 27(23), 8388. https://doi.org/10.3390/molecules27238388

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