Original scientific paper
https://doi.org/10.5599/jese.1217
A sensitive and simple method for voltammetric analysis of Sudan I as an azo dye in food samples using a Fe3O4-ZIF-67/ionic liquid modified carbon paste electrode
Mahboobeh Shahsavari
; Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman 76175-133, Iran
Iran Sheikhshoaie
orcid.org/0000-0002-2450-7493
; Department of Chemistry, Faculty of Science, Shahid Bahonar University of Kerman, Kerman 76175-133, Iran
Abstract
The present studydeveloped a facile and fast electrochemicalapproach to sensitively analyze Sudan I using Fe3O4-ZIF-67 nanocomposite plus ionic liquid (IL). The carbon paste electrode (CPE) modified with Fe3O4-ZIF-67/IL exhibited an excellent electrochemical sensing performance to SudanI. Compared with the unmodified CPE, Fe3O4-ZIF-67/ILCPE could significantly increase the peak current of Sudan I oxidation and decrease the oxidation overpotentials. Under the best experimental conditions, the sensor using differential pulse voltammetry (DPV) technique responded to SudanI linearly (0.5 -560 μM) with a low limit of detection (LOD) of 0.1 μM. Additionally, the applicability and effectiveness of our proposed method in sensing Sudan I present in food samples was confirmed by acceptable recovery rate (96.0-103.6%).
Keywords
Electrochemicalmethod; Fe3O4-ZIF-67 nanocomposite; ionic liquid;
Hrčak ID:
273196
URI
Publication date:
24.2.2022.
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