Development of a combi-electrosensor for the detection of phenol by combining photoelectrochemistry and square wave voltammetry.

Autor: Neven L; A-Sense Lab, Bioscience Engineering Department, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., Barich H; A-Sense Lab, Bioscience Engineering Department, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., Sleegers N; A-Sense Lab, Bioscience Engineering Department, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., Cánovas R; A-Sense Lab, Bioscience Engineering Department, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., Debruyne G; A-Sense Lab, Bioscience Engineering Department, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium., De Wael K; A-Sense Lab, Bioscience Engineering Department, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium; NANOlab Center of Excellence, University of Antwerp, Groenenborgerlaan 171, 2020, Antwerp, Belgium. Electronic address: karolien.dewael@uantwerpen.be.
Jazyk: angličtina
Zdroj: Analytica chimica acta [Anal Chim Acta] 2022 May 08; Vol. 1206, pp. 339732. Date of Electronic Publication: 2022 Mar 16.
DOI: 10.1016/j.aca.2022.339732
Abstrakt: The high toxicity, endocrine-disrupting effects and low (bio)degradability commonly attributed to phenolic compounds have promoted their recognition as priority toxic pollutants. For this reason, the monitoring of these compounds in industrial, domestic and agricultural streams is crucial to prevent and decrease their toxicity in our daily life. To confront this relevant environmental issue, we propose the use of a combi-electrosensor which combines singlet oxygen ( 1 O 2 )-based photoelectrochemistry (PEC) with square wave voltammetry (SWV). The high sensitivity of the PEC sensor (being a faster alternative for traditional chemical oxygen demand-COD-measurements) ensures the detection of nmol L -1 levels of phenolic compounds while the SWV measurements (being faster than the color test kits) allow the differentiation between phenolic compounds. Herein, we report on the development of such a combi-electrosensor for the sensitive and selective detection of phenol (PHOH) in the presence of related phenolic compounds such as hydroquinone (HQ), bisphenol A (BPA), resorcinol (RC) and catechol (CC). The PEC sensor was able to determine the concentration of PHOH in spiked river samples containing only PHOH with a recovery between 96% and 111%. The SWV measurements elucidated the presence of PHOH, HQ and CC in the spiked samples containing multiple phenol compounds. Finally, the practicality of the combi-electrosensor set-up with a dual SPE containing two working electrodes and shared reference and counter electrodes was demonstrated. As a result, the combination of the two techniques is a powerful and valuable tool in the analysis of phenolic samples, since each technique improves the general performance by overcoming the inherent drawbacks that they display independently.
Competing Interests: Declaration of competing interest The authors declare that they have no known competing financial interests or personal relationships that could have appeared to influence the work reported in this paper.
(Copyright © 2022 Elsevier B.V. All rights reserved.)
Databáze: MEDLINE
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