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Abstract

Voltammetric Detection of Mercury Ions at Poly(azulene-EDTA)-like Screen Printed Modified Electrodes †

by
George-Octavian Buica
1,*,
Georgiana-Luiza Tatu (Arnold)
1,
Eleonora-Mihaela Ungureanu
1 and
Gabriela Geanina Vasile
2
1
Faculty of Applied Chemistry and Materials Science, University Politehnica of Bucharest, 1-7 Gheorghe, 060042 Bucharest, Romania
2
National Research and Development Institute for Industrial Ecology ECOIND Bucharest, 57-73 Drumul Podul Dambovitei Street, 060652 Bucharest, Romania
*
Author to whom correspondence should be addressed.
Presented at the 1st International Electronic Conference on Chemical Sensors and Analytical Chemistry, 1–15 July 2021; Available online: https://csac2021.sciforum.net/.
Chem. Proc. 2021, 5(1), 23; https://doi.org/10.3390/CSAC2021-10630
Published: 7 July 2021

Abstract

:
In recent years, many applications have been developed for the detection of different toxic metals (As, Cd, Cu, Hg, Ni, Pb) in water samples. The classic analytical methods (ICP-MS, AAS with graphite furnace, ICP-EOS with ultrasonic nebulizer) not only require a longer analysis time (pretreatment of the sample and analysis), but also the costs involved are higher as a result of expensive equipment, costs associated with the method validation process and qualified staff. The use of modified electrodes for trace metals analysi from wastewater samples represents a modern approach which can provide accurate, fast results with selectivity and sensitivity. Thus, here we present the development of the previously obtained glassy carbon-modified electrodes based on poly(2,2′-(ethane-1,2-diylbis(2-(azulen-2-ylamino)-2-oxoethyl)azanediyl))diacetic acid, (polyL) in laboratory-scale studies. In order to analyze Hg(II) ion content from aqueous samples, an assembly system made of carbon screen-printed modified electrodes (SPEs) modified with polyL selective complexing polymeric films coupled with a portable potentiostat was used. The detection of Hg(II) ions was accomplished by chemical accumulation in an open circuit followed by anodic stripping using the differential pulse voltammetry technique. The calibration curve of the analytical method was situated in the range of 20 ppb to 150 ppb (y = 0.0051x + 0.123, R2 = 0.9951), with a detection limit of 6 ppb. The precision value for the lower limit of the calibration curve was 20%, while for the upper limit, the value was 10.5%. The novelty of the method consists not only of the low cost of the analysis, but also of the possibility to provide real-time reliable information about the Hg(II) concentration in wastewater using a small and portable device.

Supplementary Materials

The following are available online at https://www.mdpi.com/article/10.3390/CSAC2021-10630/s1.

Author Contributions

G.-O.B. and G.G.V. designed the study and methodology, supervised, and wrote the main manuscript text. E.-M.U. and G.-L.T. performed the electrochemical experiments. All authors have read and agreed to the published version of the manuscript.

Funding

This research was funded by Romanian National Authority for Scientific Research, UEFISCDI, under grant PN-III-P2-2.1-PED-2019-0730, contract no. 293PED/2020.

Institutional Review Board Statement

Not applicable.

Informed Consent Statement

Not applicable.

Data Availability Statement

Not applicable.

Acknowledgments

The authors gratefully acknowledge the financial support of the Romanian National Authority for Scientific Research, UEFISCDI, under grant PN-III-P2-2.1-PED-2019-0730, contract no. 293PED/2020.

Conflicts of Interest

The authors declare no conflict of interest.
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations.

Share and Cite

MDPI and ACS Style

Buica, G.-O.; Tatu, G.-L.; Ungureanu, E.-M.; Vasile, G.G. Voltammetric Detection of Mercury Ions at Poly(azulene-EDTA)-like Screen Printed Modified Electrodes. Chem. Proc. 2021, 5, 23. https://doi.org/10.3390/CSAC2021-10630

AMA Style

Buica G-O, Tatu G-L, Ungureanu E-M, Vasile GG. Voltammetric Detection of Mercury Ions at Poly(azulene-EDTA)-like Screen Printed Modified Electrodes. Chemistry Proceedings. 2021; 5(1):23. https://doi.org/10.3390/CSAC2021-10630

Chicago/Turabian Style

Buica, George-Octavian, Georgiana-Luiza Tatu (Arnold), Eleonora-Mihaela Ungureanu, and Gabriela Geanina Vasile. 2021. "Voltammetric Detection of Mercury Ions at Poly(azulene-EDTA)-like Screen Printed Modified Electrodes" Chemistry Proceedings 5, no. 1: 23. https://doi.org/10.3390/CSAC2021-10630

APA Style

Buica, G. -O., Tatu, G. -L., Ungureanu, E. -M., & Vasile, G. G. (2021). Voltammetric Detection of Mercury Ions at Poly(azulene-EDTA)-like Screen Printed Modified Electrodes. Chemistry Proceedings, 5(1), 23. https://doi.org/10.3390/CSAC2021-10630

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