Affordable Access

Publisher Website

Enhanced oxidation and detection of toxic ractopamine using carbon nanotube film-modified electrode

Authors
Journal
Electrochimica Acta
0013-4686
Publisher
Elsevier
Publication Date
Volume
74
Identifiers
DOI: 10.1016/j.electacta.2012.04.041
Keywords
  • Carbon Nanotube
  • Surface Enhancement
  • Ractopamine
  • Electrochemical Sensor
Disciplines
  • Chemistry

Abstract

Abstract Insoluble multi-walled carbon nanotube (MWCNT) was readily dispersed into water in the presence of dihexadecyl hydrogen phosphate, and then used to modify the surface of glassy carbon electrode (GCE) by means of solvent evaporation. Scanning electron microscopy test indicated that the GCE surface was coated with uniform MWCNT film. The resulting MWCNT film-modified GCE greatly enhanced the oxidation signal of ractopamine. The oxidation mechanism was studied, and it was found that the oxidation of ractopamine occurred at two phenolic hydroxyl groups, involving two protons and two electrons. Moreover, the influences of pH value, amount of MWCNT, accumulation potential and time were investigated on the oxidation signal of ractopamine. Based on the strong enhancement effect of MWCNT, a sensitive, rapid and simple electrochemical method was developed for the detection of ractopamine. The linear range was from 50μgL−1 to 2mgL−1, and the detection limit was 20μgL−1. Finally, this method was successfully used to detect the content of ractopamine in pork and liver samples, and the recovery was in the range from 93.1% to 107.2%.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

Surface-enhanced oxidation and detection of Sunset...

on Colloids and Surfaces B Bioint... Jan 01, 2009

Voltammetric selectivity conferred by the modifica...

on Sensors and Actuators B Chemic... Jan 01, 2010

Voltammetric selectivity conferred by the modifica...

on Sensors and Actuators B Chemic... Mar 04, 2010

High performance semiconducting enriched carbon na...

on J. of Advances in Biology; 7(1... May 07, 2014
More articles like this..