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Journal of Electrochemical Science and Engineering, Vol. 12 No. 6, 2022.

Izvorni znanstveni članak

https://doi.org/10.5599/jese.1390

Theoretical and electrochemical analysis of L-serine modified graphite paste electrode for dopamine sensing applications in real samples

Revanappa Santhosh Kumar ; Department of Chemistry, University B.D.T. College of Engineering, Visvesvaraya Technological University, Davangere - 577004, Karnataka, India
Gururaj Kudur Jayaprakash orcid id orcid.org/0000-0003-0681-7815 ; Laboratory of Quantum Electrochemistry, School of Advanced Chemical Sciences, Shoolini University, Bajhol, Himachal Pradesh, 173229, India and Department of Chemistry, Nitte Meenakshi Institute of Technology, Bangalore, Karnataka, 560064, India
Siddalinganahalli Manjappa ; Department of Chemistry, University B.D.T. College of Engineering, Visvesvaraya Technological University, Davangere - 577004, Karnataka, India
Mohan Kumar ; Department of Chemistry, PES Institute of Technology and Management, Sagar Road, Guddada Arakere, Kotegangoor, 577204, Shivamogga, India
Avvaru Praveen Kumar ; Department of Applied Chemistry, School of Applied Natural Science, Adama Science and Technology University, P O Box 1888, Adama, Ethiopia

Puni tekst: engleski pdf 668 Kb

str. 1243-1250

preuzimanja: 91

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Sažetak

In this study, the carbon paste electrode (CPE) was modified by grinding L-serine in a pestle and mortar. L-serine (L-s) was shown to be an effective electrocatalyst at the modified CPE (MCPE) interface for detecting dopamine (DA). L-sMCPE showed excellent activity to detect DA in commercial injection samples with a recovery range of 98.9 to 100.5 %. Theoretical studies were used to understand the electrocatalysis of L-serine at the atomic level using frontier molecular orbitals (FMO) and analytical Fukui assay. According to theoretical findings, the amine group of L-serine works as an extra oxidation site (reason for enhanced reduction peak DA) and the carboxylic acid group acts as an additional reduction site (reason for enhanced oxidation peak DA) at the L-sMCPE interface.

Ključne riječi

Amino acid; redox reaction; quantum chemical modelling; voltammetry; sensor; dopamine

Hrčak ID:

287007

URI

https://hrcak.srce.hr/287007

Datum izdavanja:

7.12.2022.

Posjeta: 306 *