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首页> 外文期刊>American Journal of Analytical Chemistry >Electrochemical Detection of Sudan I Using a Multi-Walled Carbon Nanotube/Chitosan Composite Modified Glassy Carbon Electrode
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Electrochemical Detection of Sudan I Using a Multi-Walled Carbon Nanotube/Chitosan Composite Modified Glassy Carbon Electrode

机译:多壁碳纳米管/壳聚糖复合修饰玻碳电极电化学检测苏丹红I

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In this work, a simple and sensitive electrochemical method was developed to determine Sudan I by cyclic voltammetry and differential pulse voltammetry using a glassy carbon electrode modified with a chitosan/carbon nanotube composite. In cyclic voltammetry, Sudan I exhibited a well-defined oxidation peak located at 0.72 V at the multi-walled carbon nanotube (MWCNT)/chitosan-modified GCE. The determination conditions, including pH, scan rate, and chitosan: MWCNT mass ratio at the modified electrode, were optimized. Under the optimum experimental conditions, Sudan I could be linearly detected by differential pulse voltammetry with a detection limit of 3.0 × 10-8 mol?L-1.
机译:在这项工作中,开发了一种简单而灵敏的电化学方法,通过使用壳聚糖/碳纳米管复合材料修饰的玻璃碳电极,通过循环伏安法和差分脉冲伏安法测定苏丹I。在循环伏安法中,苏丹I在多壁碳纳米管(MWCNT)/壳聚糖修饰的GCE处的0.72 V处表现出明确的氧化峰。优化了测定条件,包括pH,扫描速率和修饰电极上的壳聚糖:MWCNT质量比。在最佳实验条件下,可以通过差分脉冲伏安法线性检测苏丹红I,检出限为3.0×10-8 mol?L-1。

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