Electrochemical determination of Sudan IV in food samples by using graphene-modified glassy carbon electrodes

Authors : Meifeng CHEN, Xinying MA, Xia LI

Pages : 959-965

Doi:10.3906/kim-1207-6

View : 17 | Download : 7

Publication Date : 0000-00-00

Article Type : Research Paper

Abstract :A simple and sensitive modified electrode was fabricated with graphene via the drop-casting method and applied for the electrochemical detection of Sudan IV. Cyclic voltammetry insert ignore into journalissuearticles values(CV); was used to investigate the electrochemical behaviors of Sudan IV in phosphate buffer solution insert ignore into journalissuearticles values(PBS);. The experimental conditions such as determining medium, scan rate, and accumulation time were optimized for the determination of Sudan IV. The sensor has excellent performance associated with high sensitivity, a low detection limit insert ignore into journalissuearticles values(6.00 \times 10-8 M);, and a wide linear range of 2.00 \times 10-7 M to 8.00 \times 10-5 M with a correlation coefficient as follows: ipc insert ignore into journalissuearticles values(A); = 4.37 \times 10-6 + 0.35C, R = 0.9930. Under optimized conditions, the applicability of the method for rapid determination of Sudan IV was corroborated by analyzing food samples with recoveries from 96.8% to 99.2%, and the related RSD values were within the range of 1.51% to 3.78%. A simple extraction procedure using ethanol was applied for the extraction of Sudan IV from samples of chili powder and tomato sauce.
Keywords : Sudan IV, graphene, food, modified electrode, determination