Premium
Electrochemiluminescence of an electrocatalytic action of etimicin on Tris(2,2′‐bipyridyl)ruthenium(II) immobilized in Nafion modified carbon paste electrode
Author(s) -
Zhuang Yafeng,
Zhang Jintao
Publication year - 2009
Publication title -
luminescence
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.428
H-Index - 45
eISSN - 1522-7243
pISSN - 1522-7235
DOI - 10.1002/bio.1162
Subject(s) - electrochemiluminescence , ruthenium , nafion , electrode , cyclic voltammetry , detection limit , electrochemistry , chemistry , selectivity , inorganic chemistry , nuclear chemistry , catalysis , chromatography , organic chemistry
A sensitive electrochemiluminescence (ECL) detection of etimicin at Tris(2,2′‐bipyridyl)ruthenium(II) [Ru(bpy) 3 2+ ]–Nafion modified carbon paste electrodes was developed. The immobilized Ru(bpy) 3 2+ shows good electrochemical and photochemical activities. Electrochemical and electrochemiluminescence characterizations of the modified carbon electrodes were made by means of cyclic voltammetry and electrochemical impendence spectroscopy. The modified electrode showed an electrocatalytic response to the oxidation of etimicin, producing a sensitized ECL signal. The ECL sensor showed a linear response to etimicin in the range of 8.0–160.0 ng mL −1 with a detection limit of 6.7 ng mL −1 . This method for etimicin determination possessed good sensitivity and reproducibility with a coefficient of variation of 5.1% ( n = 7) at 100 ng mL −1 . The ECL sensor showed good selectivity and long‐term stability. Its surface could be renewed quickly and reproducibly by a simple polish step. Copyright © 2009 John Wiley & Sons, Ltd.