Electrochemical determination of caffeic acid in antioxidant beverages samples via a facile synthesis of carbon/iron-based active electrocatalyst

Raja Nehru; Yung-Fu Hsu; Sea-Fue Wang

doi:10.1016/j.aca.2020.05.001

Electrochemical determination of caffeic acid in antioxidant beverages samples via a facile synthesis of carbon/iron-based active electrocatalyst

Anal Chim Acta. 2020 Jul 25:1122:76-88. doi: 10.1016/j.aca.2020.05.001. Epub 2020 May 6.

Authors

Raja Nehru¹, Yung-Fu Hsu², Sea-Fue Wang³

Affiliations

¹ Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, 10608, Taiwan. Electronic address: nrajache@gmail.com.
² Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, 10608, Taiwan. Electronic address: yfhsu@ntut.edu.tw.
³ Department of Materials and Mineral Resources Engineering, National Taipei University of Technology, 1, Sec. 3, Chung-Hsiao E. Rd, Taipei, 10608, Taiwan. Electronic address: sfwang@ntut.edu.tw.

PMID: 32503746
DOI: 10.1016/j.aca.2020.05.001

Abstract

An electrochemical method has described for the voltammetric determination and oxidation of caffeic acid (CA) at a glassy carbon electrode (GCE) modified carbon/iron-based active catalyst as a sensing platform. In this study, we have developed a highly sensitive electrochemical CA sensor with f-MWCNTs/α-NaFeO₂ composite, which was developed by a simple ultrasonication method. The microstructural features of the f-MWCNTs/α-NaFeO₂ composite characterized by different physicochemical and analytical techniques. Under the optimized condition, the developed sensor archive the ultra-sensitivity (44.6859 μA μM^-1cm^-2) at a lower concentration with excellent linearity (R² = 0.9943) and which shows low detection limit (LOD = 0.002 μM) and Limit of quantification (LOQ = 0.0068 μM) by using differential pulse voltammetry (DPV) technique. The suggested sensor may improve the effective and efficient platform to the determination of CA in the healthcare system.

Keywords: Antioxidant; Caffeic acid sensor; Electrochemical sensor; Functionalized multi-walled carbon nanotubes; Sodium iron oxide.

MeSH terms

Antioxidants / chemistry*
Beverages / analysis*
Caffeic Acids / analysis*
Carbon / chemistry*
Catalysis
Electrochemical Techniques*
Electrodes
Iron / chemistry*
Molecular Structure
Oxidation-Reduction

Substances

Antioxidants
Caffeic Acids
Carbon
Iron
caffeic acid