Simultaneous determination of Dopamine, Uric acid and Folic acid with Electrochemical Techniques based on Co<sub>3</sub>O<sub>4</sub>/rGO/CTAB Modified Carbon Paste Electrode

M.Venu; ViondKumarGupta; ShilpiAgarwa; SadaVenkateswarlu; G.Madhavi

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Simultaneous determination of Dopamine, Uric acid and Folic acid with Electrochemical Techniques based on Co₃O₄/rGO/CTAB Modified Carbon Paste Electrode

机译：Co _{3 O _{4 / rGO / CTAB修饰碳糊电极的电化学技术同时测定多巴胺，尿酸和叶酸}}

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The electrochemical has been constructed based on Co3O4/rGO nanocomposite in presence of CTABmodified carbon paste electrode (CPE) and was developed for the simultaneous determination ofdopamine, uric acid and folic acid at physiological pH 7.0 (PBS, 0.1 M). The physico-chemicalanalysis of nanocomposite was characterized by FT-IT, PXRD, SEM, TEM and EDX. The modifiedsensor showed well defined and stable reversible peak couple in both alkaline and aqueous solution.From the differential pulse voltammetry (DPV), the electrochemical sensor showed excellentelectrocatalytic activity for the oxidation of dopamine, limit of detection (LOD) and limit ofquantification (LOQ) of DA are calculated to be 2.8 μM and 10 μM, respectively. TheCo3O4/rGO/CTAB MCPE showed an efficient electron mediating behavior with well defined oxidationpeak potentials between DA to UA and UA to FA were 0.12 V and 0.39 V, respectively. From thecyclic voltammetry the results obtained for the linear calibration plots and the limit of detection of DA,UA and FA were calculated to be 7 μM, 94 μM and 19 μM, respectively. The developed sensor wassuccessfully employed to sensing of DA in real samples.

机译：在CTAB修饰的碳糊电极（CPE）存在下，基于Co3O4 / rGO纳米复合材料构建了电化学体系，并开发了用于在生理pH 7.0（PBS，0.1 M）下同时测定多巴胺，尿酸和叶酸的电化学方法。通过FT-IT，PXRD，SEM，TEM和EDX对纳米复合材料进行了理化分析。改进后的传感器在碱性和水溶液中均表现出良好的定义和稳定的可逆峰偶合。从差动脉冲伏安法（DPV）来看，电化学传感器对多巴胺的氧化，检测限（LOD）和定量限（LOQ）表现出优异的电催化活性。 DA的计算值分别为2.8μM和10μM。 Co3O4 / rGO / CTAB MCPE表现出有效的电子介导行为，DA与UA之间以及UA与FA之间的明确定义的氧化峰电位分别为0.12 V和0.39V。从循环伏安法得出的线性校准图的结果以及DA，UA和FA的检出限分别计算为7μM，94μM和19μM。研制成功的传感器成功地用于实际样品中的DA感测。

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《International Journal of Electrochemical Science》 |2018年第12期|共18页
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M.Venu; ViondKumarGupta; ShilpiAgarwa; SadaVenkateswarlu; G.Madhavi;
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Simultaneous determination of Dopamine, Uric acid and Folic acid with Electrochemical Techniques based on Co3O4/rGO/CTAB Modified Carbon Paste Electrode

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Simultaneous determination of Dopamine, Uric acid and Folic acid with Electrochemical Techniques based on Co₃O₄/rGO/CTAB Modified Carbon Paste Electrode