The combination of iron (III) oxide nanoparticles (Fe2O3NP) with functionalized multi-walled carbon nanotubes (MWCNT) has been used to develop a new and easily prepared modified glassy carbon electrode (GCE). The Fe2O3NP-MWCNT/GCE were electrochemically characterized by cyclic voltammetry with the model hexacyanoferrate(III)/(II) redox probe. Their application as electrochemical sensors was demonstrated using levodopa oxidation, with excellent analytical performance. The analytical parameters compare favourably with other similar modified electrodes reported in the literature. Excellent selectivity was shown in interference studies and the determination of levodopa was carried out in pharmaceutical samples.

中文翻译：

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氧化铁纳米颗粒和多壁碳纳米管改性玻碳电极。在左旋多巴检测中的应用

铁 (III) 氧化物纳米粒子 (Fe2O3NP) 与功能化多壁碳纳米管 (MWCNT) 的组合已被用于开发新的且易于制备的改性玻璃碳电极 (GCE)。Fe2O3NP-MWCNT/GCE 通过循环伏安法与模型六氰基铁酸盐 (III)/(II) 氧化还原探针进行电化学表征。使用左旋多巴氧化证明了它们作为电化学传感器的应用，具有出色的分析性能。分析参数与文献中报道的其他类似的修饰电极相比具有优势。干扰研究显示出优异的选择性，并且在药物样品中进行了左旋多巴的测定。