Voltammetric determination of cysteine at a graphite electrode modified with gold nanoparticles

被引：26
|
作者：
Perevezentseva, D. O. [1 ]
Gorchakov, E. V. [2 ]
机构：
[1] Tomsk Polytech Univ, Dept Gen & Inorgan Chem, Tomsk 634050, Russia
[2] Tomsk Polytech Univ, Innovat Sci Educ Ctr Gold Platinum, Tomsk 634050, Russia
来源：
JOURNAL OF SOLID STATE ELECTROCHEMISTRY | 2012年 / 16卷 / 07期
关键词：
Cyclic voltammetry; Electrocatalysis; Cysteine; Gold nanoparticles; CARBON-PASTE ELECTRODE; SPECTROPHOTOMETRIC DETERMINATION; CYSTINE; OXIDATION; PROTEINS; COMPLEX; URINE; ACID;
D O I：
10.1007/s10008-012-1727-2
中图分类号：
O646 [电化学、电解、磁化学];
学科分类号：
081704 ;
摘要：
The electrochemical behaviour of cysteine (Cys) at a graphite electrode modified with gold nanoparticles (G-Au-nano 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-Au-nano 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.
引用
收藏
页码：2405 / 2410
页数：6
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