Abstract
In this work, we describe application of a high-sensitive electrochemical sensor for determination of ascorbic acid (AA) in the presence of high concentration of Sudan I in food samples. In the first step, we study synthesis and characterization of NiO/NPs with X-ray diffraction (XRD) method. In the second step, application of NiO/NPs describe in the preparation of carbon-paste electrode modified with (9,10-dihydro-9,10-ethanoanthracene-11,12-dicarboximido)-4-ethylbenzene-1,2-diol (DEDED) as a high-sensitive and selective voltammetric sensor for determination of AA and Sudan I. The electrocatalytic oxidation of AA at the modified electrode was investigated by cyclic voltammetry, chronoamperometry and square wave voltammetry (SWV). For the mixture containing AA and Sudan I, the peaks potential was well separated from each other. Their square wave voltammetrics peaks current increased linearly with their concentration at the ranges of 0.01–600 and 0.5–1,000 μM, with the detection limits of 0.006 and 0.2 μM, respectively. Finally, the proposed method was also examined as a selective, simple, and precise electrochemical sensor for the determination of AA and Sudan I in real samples such as fruit juices, fresh vegetable juice, chilli sauce and tomato sauce.
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Acknowledgments
The authors wish to thank the Graduate University of Advanced Technology, Kerman, Iran for their support.
Conflict of Interest
Hassan Karimi-Maleh declares that has no conflict of interest. Mahbobeh Moazampour declares that has no conflict of interest. Mehdi Yoosefian declares that has no conflict of interest. Afsaneh L. Sanati declares that has no conflict of interest. Fahimeh Tahernejad-Javazmi declares that has no conflict of interest. Mohamad Mahani declares that has no conflict of interest. This work did not receive support from the University, and research has been conducted in the Laboratory of Nano Sciences in the Graduate University of Advanced Technology, Kerman, Iran. Finally, this article does not contain any studies with human or animal subjects.
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Karimi-Maleh, H., Moazampour, M., Yoosefian, M. et al. An Electrochemical Nanosensor for Simultaneous Voltammetric Determination of Ascorbic Acid and Sudan I in Food Samples. Food Anal. Methods 7, 2169–2176 (2014). https://doi.org/10.1007/s12161-014-9867-x
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DOI: https://doi.org/10.1007/s12161-014-9867-x