Next Article in Journal
The Statistical Meaning of Kurtosis and Its New Application to Identification of Persons Based on Seismic Signals
Previous Article in Journal
A Polypyrrole-based Strain Sensor Dedicated to Measure Bladder Volume in Patients with Urinary Dysfunction
Sensors 2008, 8(8), 5096-5105; doi:10.3390/s8085096
Article

Electrocatalytic Detection of Amitrole on the Multi-Walled Carbon Nanotube – Iron (II) tetra-aminophthalocyanine Platform

1
,
2,*  and 1
1 Department of Chemistry, Rhodes University, Grahamstown 6140, South Africa 2 Molecular and Nanomaterials Electrochemistry Laboratory, Department of Chemistry, University of Pretoria, Pretoria 0002, South Africa
* Author to whom correspondence should be addressed.
Received: 21 May 2008 / Revised: 9 June 2008 / Accepted: 11 June 2008 / Published: 27 August 2008
View Full-Text   |   Download PDF [125 KB, uploaded 21 June 2014]   |   Browse Figures

Abstract

It is shown that iron(II) tetra-aminophthalocyanine complex electropolymerized onto a multi-walled carbon nanotube-modified basal plane pyrolytic graphite electrode greatly enhanced the electrocatalytic detetion of amitrole (a toxic herbicide), resulting in a very low detection limit (0.5 nM) and excellent sensitivity of 8.80±0.44 μA/nM, compared to any known work reported so far. The electrocatalytic detection of amitrole at this electrode occurred at less positive potential (~0.3 V vs Ag|ACl) and also revealed a typical coupled chemical reaction. The mechanism for this response is proposed. The electrode gave satisfactory selectivity to amitrole in the presence of other potential interfering pesticides in aqueous solutions.
Keywords: Amitrole; tetra-aminophthalocyanine; electropolymerization; multi walled carbon nanotubes; basal plane pyrolytic graphite electrode Amitrole; tetra-aminophthalocyanine; electropolymerization; multi walled carbon nanotubes; basal plane pyrolytic graphite electrode
This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).
SciFeed

Share & Cite This Article

Further Mendeley | CiteULike
Export to BibTeX |
EndNote |
RIS
MDPI and ACS Style

Siswana, M.; Ozoemena, K.I.; Nyokong, T. Electrocatalytic Detection of Amitrole on the Multi-Walled Carbon Nanotube – Iron (II) tetra-aminophthalocyanine Platform. Sensors 2008, 8, 5096-5105.

View more citation formats

Related Articles

Article Metrics

For more information on the journal, click here

Comments

[Return to top]
Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert