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-  2018 

Keggin 型磷钨酸盐修饰碳糊电极传感多巴胺的研究
Synthesis of Keggin Polyoxometalates Modified Carbon Paste Electrode as A Sensor for Dopamine Detection

DOI: 10.13208/j.electrochem.180405

Keywords: 多酸,多巴胺,电化学传感器,碳糊电极,循环伏安法,
polyoxometalates
,dopamine,electrochemical sensors,carbon paste electrode,cyclic voltammetry

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Abstract:

摘要 多金属氧酸盐作为一类阴离子簇合物,由于其结构的多样性和尺寸大小的可调变性,在电化学、催化和药学等领域引起了人们的广泛关注.本文制备了多酸Co(C15N6H12)2[PW12O38]·5H2O(Co[PW12O38])修饰碳糊电极并通过电化学阻抗谱、循环伏安法以及差分脉冲伏安法对多巴胺的传感性能进行了研究.对其制备条件和检测条件分别进行了优化.在优化条件下,制备的传感器对多巴胺具有良好的选择性和灵敏度的检测能力.多巴胺的线性响应范围为8.0x10-6 mol·L-1至3x10-5 mol·L-1,灵敏度为0.039 μA·(μmol·L-1)-1,检出限(S/N=3)为5.4 x10-6 mol·L-1. 制备的多酸修饰碳糊电极用于检测多巴胺表现出良好的稳定性和重现性,并且对抗坏血酸、尿酸等常见的干扰物质,具有良好的抗干扰性. 多酸修饰的碳糊电极制备过程简单方便,成本低,传感性能良好,对应用于电化学传感器检测多巴胺具备潜在的应用前景

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