Epinephrine Oxidation in the Presence of Interfering Molecules on Gold and Gold Electrodes modified with Gold Nanoparticles and Thiodipropionic Acid in Aqueous Solution. A Comparative Study

被引:25
作者
Luczak, Teresa [1 ]
机构
[1] Adam Mickiewicz Univ, Fac Chem, PL-60780 Poznan, Poland
关键词
Epinephrine; Nanoparticle; Gold electrode; Self assembled layers; Electrooxidation; Electrocatalysis; GLASSY-CARBON ELECTRODE; SELF-ASSEMBLED MONOLAYERS; ASCORBIC-ACID; URIC-ACID; ELECTROCATALYTIC PROPERTIES; ELECTROCHEMICAL OXIDATION; SELECTIVE DETERMINATION; DOPAMINE; NOREPINEPHRINE; BEHAVIOR;
D O I
10.1002/elan.200900303
中图分类号
O65 [分析化学];
学科分类号
070302 ; 081704 ;
摘要
Thiodipropionoc acid (TDPA), cysteamine (CA) and gold nanoparticles (Au-NPs) modified gold pure electrodes have been applied in voltammetric sensors for simultaneous detection of epinephrine (EP), ascorbic (AA) and uric (UA) acids. Modified electrodes with self assembled layers (SAMs) show high selectivity, sensitivity, reproducibility and stability. A linear relationship between the epinephrine concentration and the current response is obtained in the range of 0.1 mu M to 0.65 mu M with the detection limit <= 0.065 mu M for the electrodes modified at 2D surface and in the range of 0.1 mu M to 0.75 mu M with the detection limit <= 0.082 mu M for the electrodes modified at the 3D surface.
引用
收藏
页码:2557 / 2562
页数:6
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