Journal
FOOD CHEMISTRY
Volume 286, Issue -, Pages 191-196Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.foodchem.2019.01.143
Keywords
Sudan I; Screen printed electrode; La3+-doped Co3O4 nanocubes
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In current research, a sensitive screen printed electrochemical sensor on the basis of La3+-doped Co3O4 nanocubes was fabricated to determine sudan I. The electrochemical performance of sudan I at this sensor was investigated in detail, presenting that this sensor had electrocatalytic behavior for oxidizing sudan I due to the significant peak current enhancement and the dropping of oxidation overpotential. Under the optimum conditions, the linear response range for sudan I concentrations by the modified sensor was 0.3-300.0 mu M, and detection limit was 0.05 mu M. Lastly, the suggested technique was also studied as a selective, easy, and exact electrochemical sensor to determine sudan I in food samples, including chili powder, tomato paste, and ketchup sauce.
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