Journal
INTERNATIONAL JOURNAL OF ELECTROCHEMICAL SCIENCE
Volume 15, Issue 3, Pages 2539-2548Publisher
ESG
DOI: 10.20964/2020.03.30
Keywords
Caffeic acid; Fe3O4 nanoparticle; 1-methyl-3-butylimidazolium bromide; Food electrochemical sensor
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In this study, the fabrication of a carbon paste electrode (CPE) amplified with Fe3O4 nanoparticles (Fe3O4-NPs) and 1-methyl-3-butylimidazolium bromide (MBIBr) is reported as a food analytical sensor for determining caffeic acid (CA). The electrochemical behavior of CA on the Fe3O4-NPs/MBIBr/CPE is investigated via voltammetric techniques. Also, the capability of the Fe3O4-NPs/MBIBr/CPE for CA determination in different food samples is checked. The Fe3O4-NPs/MBIBr/CPE shows a powerful ability for improving the oxidation signal of CA with a low limit of detection 8.0x10(-9) mol/L. The recorded signals show linear a dynamic range 2.0x10(-8) - 1.0x10(-4) mol/L with linear coefficients of 0.9941 for CA determination at surface of Fe3O4-NPs/MBIBr/CPE. Additionally, the Fe3O4-NPs/MBIBr/CPE shows remarkably good stability, rapid response, repeatability, and selectivity.
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