Gold Electrodes Modified with Self-Assembled Layers Made of Sulphur Compounds and Gold Nanoparticles Used for Selective Electrocatalytic Oxidation of Catecholamine in the Presence of Interfering Ascorbic and Uric Acids | Zendy

Teresa Łuczak | Zendy

Open Access

Gold Electrodes Modified with Self-Assembled Layers Made of Sulphur Compounds and Gold Nanoparticles Used for Selective Electrocatalytic Oxidation of Catecholamine in the Presence of Interfering Ascorbic and Uric Acids

Author(s) -

Teresa Łuczak

Publication year - 2011

Publication title -

international journal of electrochemistry

Language(s) - English

Resource type - Journals

eISSN - 2090-3537

pISSN - 2090-3529

DOI - 10.4061/2011/179474

Subject(s) - ascorbic acid , detection limit , electrode , colloidal gold , electrochemistry , aqueous solution , uric acid , linear range , chemistry , materials science , nanoparticle , nuclear chemistry , inorganic chemistry , chromatography , nanotechnology , organic chemistry , biochemistry , food science

Gold electrodes modified with S-containing compounds and gold nanoparticles were used for determination of epinephrine (EP) in aqueous solution. The modified electrodes exhibited a good sensitivity, reproducibility, and stability. The results have shown that modified electrodes could clearly resolve the oxidation peaks of epinephrine, ascorbic acid (AA), and uric acid (UA) with peak-to-peak separation enabling determination of EP, AA, and UA in their simultaneous presence. A linear relationship between EP concentration and current response was obtained in the range of 0.1 μM to 700 μM with the detection limit ≥0.034 μM for the electrodes modified at 2D template and in the range of 0.1 μM to 800 μM with the detection limit ≥0.030 μM for the electrodes modified at 3D template

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