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Electrochemical Method for Ease Determination of Sodium Diclofenac Trace Levels in Water Using Graphene—Multi-Walled Carbon Nanotubes Paste Electrode

1
“Coriolan Drăgulescu” Institute of Chemistry, Romanian Academy, 24 Mihai Viteazu Bvd., 300223 Timisoara, Romania
2
Department of Applied Chemistry and Engineering of Inorganic Compounds and Environment, Politehnica University of Timisoara, 6 Bv. V. Parvan, 300223 Timisoara, Romania
3
National Condensed Matter Department, Institute for Research and Development in Electrochemistry and Condensed Matter Timisoara, 1 P. Andronescu Street, 300254 Timisoara, Romania
*
Author to whom correspondence should be addressed.
Academic Editor: Paul B. Tchounwou
Int. J. Environ. Res. Public Health 2022, 19(1), 29; https://doi.org/10.3390/ijerph19010029
Received: 6 November 2021 / Revised: 16 December 2021 / Accepted: 18 December 2021 / Published: 21 December 2021
Sodium diclofenac (DCF) presence reported in water use cycle at various concentrations including trace levels necessitates continuous development of advanced analytical method for its determination. In this work, ease electrochemical methods for DCF determination based on voltammetric and amperometric techniques were proposed using a simple combination of graphene with multi-walled carbon nanotubes as paste electrode. Integration of the graphene with multi-walled carbon nanotubes enlarged the electroactive surface area of the electrode and implicitly enhanced the electrochemical response for DCF determination. On the basis of the sorption autocatalytic effect manifested at low concentration of DCF, we found that the preconcentration step applied prior to differential-pulsed voltammetry (DPV) and multiple-pulsed amperometry (MPA) allowed for the enhancement of the electroanalytical performance of the DCF electrochemical detections, which were validated by testing in tap water. The lowest limit of detection (LOD) of 1.40 ng·L−1 was found using preconcentration prior to DPV under optimized operating conditions, which is better than that reached by other carbon-based electrodes reported in the literature. View Full-Text
Keywords: water quality; water monitoring; sodium diclofenac; graphene; multi-walled carbon nanotubes; paste electrode; electrochemical detection; sorption; preconcentration water quality; water monitoring; sodium diclofenac; graphene; multi-walled carbon nanotubes; paste electrode; electrochemical detection; sorption; preconcentration
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MDPI and ACS Style

Motoc, S.; Manea, F.; Baciu, A.; Orha, C.; Pop, A. Electrochemical Method for Ease Determination of Sodium Diclofenac Trace Levels in Water Using Graphene—Multi-Walled Carbon Nanotubes Paste Electrode. Int. J. Environ. Res. Public Health 2022, 19, 29. https://doi.org/10.3390/ijerph19010029

AMA Style

Motoc S, Manea F, Baciu A, Orha C, Pop A. Electrochemical Method for Ease Determination of Sodium Diclofenac Trace Levels in Water Using Graphene—Multi-Walled Carbon Nanotubes Paste Electrode. International Journal of Environmental Research and Public Health. 2022; 19(1):29. https://doi.org/10.3390/ijerph19010029

Chicago/Turabian Style

Motoc, Sorina, Florica Manea, Anamaria Baciu, Corina Orha, and Aniela Pop. 2022. "Electrochemical Method for Ease Determination of Sodium Diclofenac Trace Levels in Water Using Graphene—Multi-Walled Carbon Nanotubes Paste Electrode" International Journal of Environmental Research and Public Health 19, no. 1: 29. https://doi.org/10.3390/ijerph19010029

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