A caffeic acid electrochemical sensor amplified with GNR/CoFe2O4@NiO and 1-Ethyl-3-methylimidazolium acetate; a new perspective for food analysis

Reza Mostafazadeh; Ali Ghaffarinejad; Fariba Tajabadi

doi:10.1016/j.fct.2022.113312

A caffeic acid electrochemical sensor amplified with GNR/CoFe₂O₄@NiO and 1-Ethyl-3-methylimidazolium acetate; a new perspective for food analysis

Food Chem Toxicol. 2022 Sep:167:113312. doi: 10.1016/j.fct.2022.113312. Epub 2022 Jul 19.

Authors

Reza Mostafazadeh¹, Ali Ghaffarinejad², Fariba Tajabadi³

Affiliations

¹ Research Laboratory of Real Samples Analysis, Faculty of Chemistry, Iran University of Science and Technology (IUST), Tehran, 1684613114, Iran; Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, Karaj PO Box, 31787-316, Iran.
² Research Laboratory of Real Samples Analysis, Faculty of Chemistry, Iran University of Science and Technology (IUST), Tehran, 1684613114, Iran; Electroanalytical Chemistry Research Center, Iran University of Science and Technology (IUST), Tehran, 1684613114, Iran. Electronic address: Ghaffarinejad@iust.ac.ir.
³ Department of Nanotechnology and Advanced Materials, Materials and Energy Research Center, Karaj PO Box, 31787-316, Iran.

PMID: 35863483
DOI: 10.1016/j.fct.2022.113312

Abstract

Determining Caffeic acid is important as an antioxidant compound in food. In this study, caffeic acid (CA) was measured using a carbon paste electrode modified with GNR/CoFe₂O₄@NiO and 1-Ethyl-3-methylimidazolium acetate (EMIM Ac) as ion liquid. A simple sensor showed a higher current than a bare carbon paste; thus, it can be said that the modified electrode has a higher sensitivity for detecting CA. The linear range of this sensor and its detection limit was equal to 0.01-100.0 μM and 0.01 μM, respectively. Moreover, the developed electrode indicated outstanding selectivity in the presence of several interferences, high sensitivity, reproducibility, and long-term stability. The percentage recovery of CA obtained with the developed sensor affirmed its reliability for CA determination in real samples. The modified sensor's accuracy was confirmed to identify this analyte according to the results.

Keywords: 1-Ethyl-3-methylimidazolium acetate; Caffeic acid; Carbon paste electrode; Food sensor; Ionic liquid.

MeSH terms

Caffeic Acids
Carbon* / chemistry
Electrochemical Techniques / methods
Electrodes
Food Analysis* / methods
Imidazoles
Reproducibility of Results

Substances

Caffeic Acids
Imidazoles
Carbon
1-ethyl-3-methylimidazolium
caffeic acid