Flow-Injection Amperometric Determination of DOPA and Tyrosine at a Dual Electrode Modified with the Gold–Cobalt Binary System
- Resource Type
- Authors
- A. V. Gedmina; Herman Budnikov; L. G. Shaidarova; Yu. A. Leksina; I. A. Chelnokova; M. A. Il’ina
- Source
- Journal of Analytical Chemistry. 73:176-182
- Subject
- Dual electrode
Chemistry
010401 analytical chemistry
chemistry.chemical_element
02 engineering and technology
021001 nanoscience & nanotechnology
01 natural sciences
Signal on
Amperometry
0104 chemical sciences
Analytical Chemistry
Catalysis
Electrode
Binary system
Tyrosine
0210 nano-technology
Cobalt
Nuclear chemistry
- Language
- ISSN
- 1608-3199
1061-9348
The gold–cobalt binary system, electrodeposited on the surface of a screen-printed electrode, exhibits catalytic activity in the electrooxidation of DOPA and tyrosine. The catalytic effect is shown in a multiple increase in current compared with the oxidation current of the modifier and a decrease in the oxidation overvoltage of organic compounds. Methods for the flow-injection amperometric determination of DOPA and tyrosine at the proposed modified electrode are developed. The simultaneous amperometric determination of DOPA and tyrosine at a dual screen-printed electrode modified with an Au–Co binary system the under conditions of flow-injection analysis is demonstrated. The linear dependence of the analytical signal on the concentration of DOPA and tyrosine is observed in the ranges from 1 × 10–9 to 1 × 10–4 M and from 5 × 10–8 to 5 × 10–4 M, respectively.