Akademik Veri Yönetim Sistemi
Microchemical Journal, cilt.217, 2025 (SCI-Expanded)
In this study, Allura Red was determined by differential pulse voltammetry with a poly(Aniline Blue) modified pencil graphite electrode (poly(AB)-PGE). The electrochemical behavior of the modified electrode was systematically investigated through cyclic voltammetry (CV) and electrochemical impedance spectroscopy (EIS). Surface examination of the pencil graphite electrode via SEM indicated notable structural changes associated with the incorporation of poly(AB), confirming the success of the modification process. The results showed conductive and electroactive polymer film modification of the electrode surface, increasing the effective electrode surface area and electrocatalytic role. The poly(AB)-PGE was employed to assess the electrocatalytic oxidation of Allura Red using cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Compared to unmodified PGE, the modified electrode caused an approximately 6.5-fold increase in the oxidation peak current value of Allura Red. DPV measurements indicated a linear relationship between the peak current and Allura Red concentration within the range of 0.87 nmol L−1 to 3.00 μmol L−1, achieving a detection limit (S/N = 3) of 0.25 nmol L−1. The developed sensor was effectively applied for Allura Red determination, yielding satisfactory recovery results in candy, tomato paste, and soft drink powder analysis. The developed voltammetric method was compared with a spectroscopic technique, and the results obtained from both methods were found to be in good agreement.