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

Yardım D., Pınar P. T.

Journal of Food Measurement and Characterization, vol.18, no.11, pp.9113-9122, 2024 (SCI-Expanded, Scopus) identifier

  • Publication Type: Article / Article
  • Volume: 18 Issue: 11
  • Publication Date: 2024
  • Doi Number: 10.1007/s11694-024-02863-6
  • Journal Name: Journal of Food Measurement and Characterization
  • Journal Indexes: Science Citation Index Expanded (SCI-EXPANDED), Scopus, Agricultural & Environmental Science Database, CAB Abstracts, Compendex, Food Science & Technology Abstracts, Veterinary Science Database
  • Page Numbers: pp.9113-9122
  • Keywords: Alpha-lipoic acid, Antioxidant, Electrochemical oxidation, Food additive, Multi-walled carbon nano-tubes, Surfactant
  • Van Yüzüncü Yıl University Affiliated: Yes

Abstract

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.