The electrochemical properties of dopamine,epinephrine and their simultaneous determination at a poly(L-methionine) modified electrode |
| |
Authors: | W Ma D M Sun |
| |
Institution: | (1) Department of Chemistry, Huaibei Coal Normal College, 100 Dongshan Road, Huaibei, Anhui Province, 235000, P.R. China |
| |
Abstract: | A poly(L-methionine) modified electrode, fabricated by electrochemical immobilization of the L-methionine on a glassy carbon
electrode, was used for simultaneous determination of dopamine and epinephrine through cyclic voltammetry. The electrochemical
properties of dopamine and epinephrine have been investigated. This sensor gave two separated cathodic peaks at −0.282 and
0.112 V for EP and DA, respectively. A linear response was obtained in the range of 5.0 × 10−7 to 1.0 × 10−4 mol l−1 for epinephrine, and 1.0 × 10−6 to 5.0 × 10−4 mol l−1 for dopamine. The detection limits were 3.6 × 10−7 mol l−1 and 4.2 × 10−7 mol l−1 for epinephrine and dopamine, respectively. This method was successfully applied for simultaneous determination of dopamine
and epinephrine in human urines.
The text was submitted by the authors in English. |
| |
Keywords: | L-methionine Dopamine Epinephrine Simultaneous determination Modified electrode |
本文献已被 SpringerLink 等数据库收录! |
|