Issue 2, 2011

Determination of melamine based on electrochemiluminescence of Ru(bpy)32+ at bare and single-wall carbon nanotube modified glassy carbon electrodes

Abstract

The electrochemiluminescence (ECL) of Ru(bpy)32+ at bare and single-wall carbon nanotube (SWNT) modified glassy carbon (GC) electrodes has been employed for the determination of melamine for the first time, giving a linear response (R2 = 0.99682) for melamine concentration from 1.0 × 10−10 to 1.0 × 10−5 M at a bare GC electrode in pH 10 borate buffer, and the detection limit is 1.0 × 10−10 M. However, the detection limit can be reduced further to 1.0 × 10−13 M after modification of the GC electrode by SWNTs. This is much lower compared to other detection methods. The proposed method was applied to the determination of melamine added to a commercial milk sample; the recovery is quite satisfactory with good reproducibility and stability. All of these results provide the possibility of developing a novel ECL detection method for melamine.

Graphical abstract: Determination of melamine based on electrochemiluminescence of Ru(bpy)32+ at bare and single-wall carbon nanotube modified glassy carbon electrodes

Supplementary files

Article information

Article type
Paper
Submitted
30 Sep 2010
Accepted
06 Oct 2010
First published
04 Nov 2010

Analyst, 2011,136, 374-378

Determination of melamine based on electrochemiluminescence of Ru(bpy)32+ at bare and single-wall carbon nanotube modified glassy carbon electrodes

F. Liu, X. Yang and S. Sun, Analyst, 2011, 136, 374 DOI: 10.1039/C0AN00765J

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