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首页> 外文期刊>Electroanalysis >Development of a carbon nanotube modified ionic liquid electrode for the voltammetric determination of methyldopa levels in urine
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Development of a carbon nanotube modified ionic liquid electrode for the voltammetric determination of methyldopa levels in urine

机译：碳纳米管修饰的离子液体电极的开发，用于伏安法测定尿液中甲基多巴的含量

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摘要

A glassy carbon electrode was modified with carbon nanotubes and the ionic liquid N-butyl pyridinium trifluoromethyl methanesulfonate for the determination of methyldopa in urine samples. Methyldopa exhibited a well-defined anodic signal over a broad pH range of 2-10 and the peak current increased approximately 100 fold over that of the unmodified electrode. Accordingly, a novel method for the determination of methyldopa was proposed using differential pulse voltammetry. The peak current was linear over a methyldopa concentration range from 21 to 2111ngmL~(-1) with a LOD of 6.9ngmL~(-1) and a LOQ of 7.4ngmL~(-1). The method was applied to determine the excretion profile of methyldopa in urine without sample pretreatment.
机译：用碳纳米管和离子液体N-丁基吡啶鎓三氟甲基甲烷磺酸盐修饰玻碳电极，用于测定尿液样品中的甲基多巴。甲基多巴在2-10的宽pH范围内均显示出清晰的阳极信号，并且峰值电流比未修饰的电极增加了约100倍。因此，提出了一种使用差分脉冲伏安法测定甲基多巴的新方法。在21至2111ngmL〜（-1）的甲基多巴浓度范围内，峰值电流是线性的，LOD为6.9ngmL〜（-1），LOQ为7.4ngmL〜（-1）。该方法用于测定未经样品预处理的尿液中甲基多巴的排泄曲线。

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