使用聚（2-（吗啉）乙烷磺酸）/还原氧化石墨烯修饰电极同时伏安法检测多巴胺、抗坏血酸和尿酸。

Simultaneous voltammetric detection of dopamine, ascorbic acid and uric acid using a poly(2-(-morpholine)ethane sulfonic acid)/RGO modified electrode.

作者信息

Zhang Keying, Zhang Na, Zhang Li, Wang Hongyan, Shi Hongwei, Liu Qiao

机构信息

Anhui Key Laboratory of Spin Electron and Nanomaterials, School of Chemistry and Chemical-Engineering, Suzhou University Suzhou Anhui 234000 People's Republic of China

出版信息

RSC Adv. 2018 Jan 30;8(10):5280-5285. doi: 10.1039/c7ra13267k. eCollection 2018 Jan 29.

A poly(2-(-morpholine) ethane sulfonic acid)/reduced graphene oxide (RGO) modified glassy carbon electrode (GCE) was prepared using an electropolymerization method, and was characterized by scanning electron microscopy (SEM) and electrochemical impedance spectroscopy (EIS). The electrochemical behaviors and simultaneous detection of ascorbic acid (AA), dopamine (DA) and uric acid (UA) at this electrode were studied by cyclic voltammetry (CV) and differential pulse voltammetry (DPV). Tests showed that this electrode exhibited excellent electrocatalytic activity towards the oxidation of AA, DA and UA. The oxidation peak currents of AA, DA and UA were proportional with their concentrations in the ranges 1.0 μM-30 μM (30 μM-100 μM), 0.05 μM-100 μM and 0.1 μM-100 μM, with detection limits of 0.43 μM, 0.0062 μM and 0.056 μM, respectively. In addition, this electrode exhibited an excellent selectivity, reproducibility and stability, and has been successfully used to determine real samples with satisfactory results.

采用电聚合方法制备了聚（2-（-吗啉）乙烷磺酸）/还原氧化石墨烯（RGO）修饰玻碳电极（GCE），并通过扫描电子显微镜（SEM）和电化学阻抗谱（EIS）对其进行了表征。采用循环伏安法（CV）和差分脉冲伏安法（DPV）研究了该电极上抗坏血酸（AA）、多巴胺（DA）和尿酸（UA）的电化学行为及同时检测。测试表明，该电极对AA、DA和UA的氧化表现出优异的电催化活性。AA、DA和UA的氧化峰电流在1.0 μM - 30 μM（30 μM - 100 μM）、0.05 μM - 100 μM和0.1 μM - 100 μM范围内与其浓度成正比，检测限分别为0.43 μM、0.0062 μM和0.056 μM。此外，该电极表现出优异的选择性、重现性和稳定性，并已成功用于实际样品的测定，结果令人满意。