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Square wave voltammetry for selective detection of dopamine using polyglycine modified carbon ionic liquid electrode

机译:方波伏安法用聚甘氨酸修饰的碳离子液体电极选择性检测多巴胺

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摘要

The electrochemical polymerization of glycine on carbon ionic liquid electrode (CILE) was described. The presence of ionic liquid on the surface of CILE facilitated the electropolymerization of glycine. The polyglycine modified CILE provided a valid and simple approach to selectively detect dopamine in the presence of AA in physiological environment. The proposed sensor not only decreased the voltammetric responses of AA but also dramatically enhanced the oxidation peak current of DA compared to bare CILE. Using square wave voltammetry, the modified CILE showed good electrochemical behavior to DA, a linear range of 1.0×10~(-7)-3.0×10~(-4) M in the presence of 1mM ascorbic acid (AA) and a detection limit of 5.0×10~(-9)M was estimated (S/N=3).
机译:描述了甘氨酸在碳离子液体电极(CILE)上的电化学聚合。 CILE表面上离子液体的存在促进了甘氨酸的电聚合。聚甘氨酸修饰的CILE提供了一种有效且简单的方法,可在生理环境中在AA存在下选择性检测多巴胺。与裸CILE相比,该传感器不仅降低了AA的伏安响应,而且还大大增强了DA的氧化峰值电流。使用方波伏安法,修饰的CILE对DA表现出良好的电化学行为,在1mM抗坏血酸(AA)存在下的线性范围为1.0×10〜(-7)-3.0×10〜(-4)M,并进行检测估计极限为5.0×10〜(-9)M(S / N = 3)。

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