摘要
研究了聚L-谷氨酸修饰碳黑微电极的制备及多巴胺在该电极上的电化学性质。实验表明：该修饰电极对神经递质多巴胺的电化学氧化有显著的催化作用，采用二次导数线扫伏安法对多巴胺进行定量分析，线性范围为1．0×10^-4～4．0×10^-8mol／L，检出限为8．0×10^-9mol／L。该聚合物修饰电极具有良好的选择性，能有效地排除抗坏血酸对测定的影响，用于样品分析，结果满意。
Poly （L-glutamic acid） modified carbon black microelectrode was prepared and the electrocatalytic properties to dopamine （DA） at this modified electrode were investigated. It was shown that the modified electrode exhibited a significant catalytic effect toward the oxidation of dopamine in pH 7. 0 PBS buffer solution. The linear range for the determination of dopamine is 4.0 × 10-8^- 1.0 × 10^-4 mol/L. The detection limit （3σ） is 8.0 × 10^-9 mol/L. Also, the microelectrode has good resistance to the interference of ascorbic acid. The method is applied to the determination of dopamine is samples with satisfactory results.
出处
《衡阳师范学院学报》
2007年第3期71-74,共4页
Journal of Hengyang Normal University
关键词
L-谷氨酸
碳黑微电极
多巴胺
L-Glutamic acid
carbon black microelectrode
dopamine
