基于掺镧的 CoO 纳米立方体的高灵敏度电化学传感器用于食品样品中苏丹 I 含量的测定。
Highly sensitive electrochemical sensor based on La-doped CoO nanocubes for determination of sudan I content in food samples.
机构信息
Environmental Health Engineering Research Center, Kerman University of Medical Sciences, Kerman, Iran; Department of Environmental Health, School of Public Health, Kerman University of Medical Sciences, Kerman, Iran.
NanoBioElectrochemistry Center, Bam University of Medical Sciences, Bam, Iran.
出版信息
Food Chem. 2019 Jul 15;286:191-196. doi: 10.1016/j.foodchem.2019.01.143. Epub 2019 Jan 31.
In current research, a sensitive screen printed electrochemical sensor on the basis of La-doped CoO 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 µM, and detection limit was 0.05 µM. 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.
在当前的研究中，基于掺杂 La 的 CoO 纳米立方体，研制了一种灵敏的丝网印刷电化学传感器来测定苏丹 I。详细研究了该传感器上苏丹 I 的电化学性能，结果表明，由于显著的峰电流增强和氧化过电位的降低，该传感器对苏丹 I 的氧化具有电催化作用。在最佳条件下，修饰后的传感器对苏丹 I 浓度的线性响应范围为 0.3-300.0 µM，检测限为 0.05 µM。最后，该方法还被研究为一种选择性强、简单、准确的电化学传感器，用于测定辣椒粉、番茄酱和番茄酱等食品样品中的苏丹 I。
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