A rapid voltammetric strategy for determination of ferulic acid using electrochemical nanostructure tool in food samples

• Published in: Journal of food measurement & characterization 2020-12, Vol.14 (6), p.3389-3396
• Main Authors: Ebrahimi, Peyman, Shahidi, Seyed-Ahmad, Bijad, Majedeh
• Format: Article
• Language: English
• Subjects: Acids; Buffer solutions; Chemistry; Chemistry and Materials Science; Chemistry/Food Science; Diffusion coefficient; Electrochemistry; Electron transfer; Engineering; Ferulic acid; Food; Food Science; Graphene; Ionic liquids; Mathematical analysis; Nanocomposites; Original Paper; pH effects; Room temperature; Scanning electron microscopy; Selectivity; Square waves; Statistical analysis; Statistical methods; Voltammetry; X-ray diffraction
• ISSN: 2193-4126; 2193-4134
• DOI: 10.1007/s11694-020-00585-z

In this project, we performed an electrochemical investigation using a reduced graphene (rG) decorated CdO nanocomposite/1-methyl-3-octylimidazolium tetrafluoroborate ionic liquid (MOITF) carbon paste electrode (rG-CdO/MOITF/CPE) for determination of ferulic acid in food samples. In preparation of rG-CdO/MOITF/CPE, 6% w/w rG-CdO nanocomposite and 20% v/v room temperature ionic liquid were used to modify the bare CPE. SEM (Scanning Electron Microscopy) and XRD (X-Ray Diffraction) methods were applied to characterize the structure of the synthesized rG-CdO nanocomposite. At all the stages of this research, phosphate buffer solution (PBS) with the pH of 5.0, as an optimized pH condition, was used. The electron transfer coefficient (α) was obtained ⁓0.68 by recorded data from cyclic voltammogram of rG-CdO/MOITF/CPE in the presence of ferulic acid. In addition, using the chronoamperometric technique, the diffusion coefficient (D) of ferulic acid at rG-CdO/MOITF/CPE was calculated 5.4 × 10 −5 cm 2 /s. Using the square wave voltammetry method, the linear dynamic range (LDR) was calculated to be from 0.02 to 400 μM, and the limitation of detection (LOD) was obtained as 8.0 nM. Eventually, the rG-CdO/MOITF/CPE was utilized to determine the amount of ferulic acid in food samples, and statistical calculations confirmed the sensitivity, selectivity, and precision of rG-CdO/MOITF/CPE, which is an electroanalytical tool.