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首页> 外文期刊>International Journal of Electrochemistry >Electroanalytical Characterisation of Dopa Decarboxylase Inhibitors Carbidopa and Benserazide on Multiwalled Carbon Nanotube and Poly(Nile blue A) Modified Glassy Carbon Electrodes
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Electroanalytical Characterisation of Dopa Decarboxylase Inhibitors Carbidopa and Benserazide on Multiwalled Carbon Nanotube and Poly(Nile blue A) Modified Glassy Carbon Electrodes

机译：多壁碳纳米管和聚（尼罗蓝A）修饰的玻碳电极上多巴脱羧酶抑制剂卡比多巴和苄丝肼的电分析特性

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摘要

Modified glassy carbon electrodes have been made by deposition of functionalised multiwalled carbon nanotubes (MWCNTs) followed by formation of poly(Nile blue) (PNB) films by electropolymerisation, using potential cycling in 0.1 M phosphate buffer solution (PBS) at pH 6.0. The electrochemical oxidation of carbidopa (CD) and benserazide (BS) on these MWCNTs/PNB-modified electrodes was investigated using cyclic and differential pulse voltammetry in 0.1 M PBS at different values of pH between 5.0 and 8.0; both CD and BS gave one diffusion-controlled irreversible oxidation peak in cyclic voltammetry. Analytical characterisation of CD and BS was carried out in 0.1 M PBS, pH 5.0. Peak currents in differential pulse voltammetry were linear over the concentration range of1×10−5to1×10−4 M for CD and4×10−6to4×10−5 M for BS. The repeatability, precision, and accuracy of the method were also investigated. Higher sensitivities and lower detection limits, of 1.17 μM for CD and 0.50 μM for BS, were obtained with this new modified electrode compared with previous studies reported in the literature.
机译：修饰的玻璃碳电极的制备方法是：沉积功能化的多壁碳纳米管（MWCNT），然后通过电聚合在pH = 6.0的0.1 M磷酸盐缓冲溶液（PBS）中进行电聚合，形成聚尼罗蓝（PNB）膜。用循环和微分脉冲伏安法在0.1 M PBS中于5.0和8.0之间的不同pH值下，对这些碳纳米管/ PNB修饰的电极上的卡比多巴（CD）和苄丝肼（BS）进行电化学氧化。 CD和BS在循环伏安法中均给出了一个扩散控制的不可逆氧化峰。 CD和BS的分析表征是在pH 5.0的0.1 M PBS中进行的。差分脉冲伏安法中的峰值电流在CD浓度范围为1×10-5至1×10-4μM范围内，而在BS浓度范围为4×10-6至4×10-5μM范围内呈线性关系。还研究了该方法的可重复性，准确性和准确性。与文献报道的以前的研究相比，使用这种新型修饰电极可获得更高的灵敏度和更低的检出限，对于CD为1.17μM，对于BS为0.50μM。

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