Voltammetric determination of cysteine at a graphite electrode modified with gold nanoparticles |
| |
| Authors: | D O Perevezentseva E V Gorchakov |
| |
| Institution: | 1. Department of General and Inorganic Chemistry, Tomsk Polytechnic University, 30 Lenin street, Tomsk, Russia, 634050
2. Innovative Scientific-Educational Centre “Gold-Platinum”, Tomsk Polytechnic University, 30 Lenin street, Tomsk, Russia, 634050
|
| |
| Abstract: | The electrochemical behaviour of cysteine (Cys) at a graphite electrode modified with gold nanoparticles (G-Aunano electrode) was studied by cyclic voltammetry. It was found that the graphite electrode-Au nanoparticles show an electrocatalytic activity towards the oxidation of Cys in 0.1?M NaOH. At 0.05?V, there is an “inverse” maximum in the cathodic voltammogram of Cys. Using a G-Aunano electrode, the dependence of the peak current of the “inverse” maximum on Cys concentration was linear in the range from 1 to 14?pM, and the detection limit was 0.6?pM. The proposed analytical method is simple, rapid and sensitive. |
| |
| Keywords: | |
| 本文献已被 SpringerLink 等数据库收录！ |
|
