The voltammetric determination and electrochemical mechanism of alpha-lipoic acid at a multi-walled carbon nanotube-surfactant modified glassy carbon electrode in the food additive sample

• Published in: Journal of food measurement & characterization Vol. 18; no. 11; pp. 9113 - 9122
• Main Authors: Yardım, Dilek Özcan, Pınar, Pınar Talay
• Format: Journal Article
• Language: English
• Published: New York Springer US 01-11-2024; Springer Nature B.V
• Subjects: Acids; Antioxidants; Carbon; Chemical sensors; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Chromatography; Electrochemical analysis; Electrochemical oxidation; Electrochemistry; Electrodes; Electrons; Engineering; Food additives; Food Science; Glassy carbon; Lipoic acid; Literature reviews; Multi wall carbon nanotubes; Nanotechnology; Nanotubes; Original Paper; Potassium; Sensors; Surfactants; Voltammetry; Food additive; Antioxidant; Surfactant; Multi-walled carbon nano-tubes; Electrochemical oxidation; Alpha-lipoic acid
• ISSN: 2193-4126; 2193-4134
• DOI: 10.1007/s11694-024-02863-6

Alpha-lipoic acid (α-LA) is a naturally occurring compound that is both water and fat soluble, functioning as a powerful antioxidant in the body. In this study, multi-walled carbon nanotubes (MWCNTs) with SDS were electrodeposited onto a glassy carbon electrode (GCE) electrochemically. This modified electrode was characterized by electrochemical techniques (EIS, CV). The MWCNT/SDS-modified GCE was utilized for the analysis of α-LA. An electrochemical oxidation mechanism for α-LA was proposed using the developed electrochemical sensor. After optimizing the conditions, the MWCNT/SDS-GCE sensor exhibited a linear response in the concentration range of 0.6–9.0 µM, with a detection limit of 0.15 µM. Additionally, this chemical sensor was effectively utilized for the electrochemical analysis of α-LA in the food additive sample.