| Autor: |
Thi Huong Giang Le, Thi Mai Nguyen, Thi Thanh Nhan Pham, Trong Bang Do, Minh Huong Giang Dang, Thi Kim Thuong Nguyen |
| Předmět: |
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| Zdroj: |
Analytical & Bioanalytical Electrochemistry; May2023, Vol. 15 Issue 5, p371-381, 11p |
| Abstrakt: |
The electrochemical properties of Allura red on a glassy carbon electrode modified with the electrochemically reduced graphene oxide (ErGO/GCE) was investigated by cyclic voltammetry and differential pulse adsorptive anodic stripping voltammetry. The ErGO/GCE was fabricated of electrochemical reduced method in conditions: Graphene oxide was dispersed in water and electrochemically reduced for 15 cycles, potential scan range from 0 V to -1.5 V, scan rate 30 mV.s-1. The electrochemical behaviors of Allura red on the ErGO/GCE are semireversible oxidation and the Allura red had adsorptive on the surface of ErGO/GCE. The optimal conditions for determination of Allura red were Britton-Robinson buffer pH = 2.5, adsorption potential 0.5 V, adsorption time 15 s, and scanning rate 12.5 mV.s-1, linearity range from 10-7 mol.L-1 to 8×10-7 mol.L-1. The limit of detection (LOD) is 2.8×10-8 mol.L-1 and limit of quantification is 9.3×10-8 mol.L-1. The ErGO/GCE was successfully used in the determination of Allura red content in food samples with high sensitivity and accuracy, simple and low cost. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Complementary Index |
| Externí odkaz: |
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