Electrochemical Investigation of Catechol at Poly(niacinamide) Modified Carbon Paste Electrode: A Voltammetric Study

Advances in Physical Chemistry Pub Date : 2016-11-07 DOI:10.1155/2016/8092860

Amit B. Teradale, S. D. Lamani, B. Swamy, P. Ganesh, Swastika N. Das

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引用次数: 13

Abstract

A polymeric thin film modified electrode, that is, poly(niacinamide) modified carbon paste electrode (MCPE), was developed for the electrochemical determination of catechol (CC) by using cyclic voltammetric technique. Compared to bare carbon paste electrode (BCPE), the poly(niacinamide) MCPE shows good electrocatalytic activity towards the oxidation of catechol in phosphate buffer solution (PBS) of physiological pH 7.4. All experimental parameters were optimized. Poly(niacinamide) modified carbon paste electrode gave a linear response between concentration of CC and its anodic peak current in the range within 20.6–229.0 μM. The limit of detection (3S/M) and limit of quantification (10S/M) were 1.497 μM and 4.99 μM, respectively. From the study of scan rate variation, the electrode process was found to be adsorption-controlled. The involvement of protons and electrons in the oxidation of CC was found to be equal. The probable electropolymerisation mechanism of niacinamide was proposed. Finally, this method can be used in development of a sensor for sensitive determination of CC.

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邻苯二酚在聚烟酰胺修饰碳糊电极上的电化学研究:伏安法研究

建立了一种聚合物薄膜修饰电极，即聚烟酰胺修饰碳糊电极(MCPE)，用于循环伏安法电化学测定儿茶酚(CC)。与裸碳糊电极(BCPE)相比，聚烟酰胺MCPE在生理pH为7.4的磷酸盐缓冲溶液(PBS)中对儿茶酚的氧化表现出良好的电催化活性。对所有实验参数进行了优化。聚烟酰胺修饰碳糊电极在20.6 ~ 229.0 μM范围内，CC浓度与其阳极峰电流呈线性关系。检测限(3S/M)和定量限(10S/M)分别为1.497 μM和4.99 μM。通过对扫描速率变化的研究，发现电极过程是由吸附控制的。发现CC氧化过程中质子和电子的参与是相等的。提出了烟酰胺可能的电聚合机理。最后，该方法可用于CC敏感测定传感器的研制。

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Advances in Physical Chemistry

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