Journal
ELECTROCHIMICA ACTA
Volume 55, Issue 8, Pages 2606-2613Publisher
PERGAMON-ELSEVIER SCIENCE LTD
DOI: 10.1016/j.electacta.2009.12.051
Keywords
Amitrole; Diuron; Single wall carbon nanotubes; Iron(II) tetraaminophthalocyanine; Chronoamperometry
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Funding
- Department of Science and Technology (DST)
- National Research Foundation (NRF) of South Africa
- Rhodes University
- NRF/DST
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FeTAPc-single walled carbon nanotube (SWCNT) dendrimers are employed as glassy carbon electrode modifiers for the electrocatalytic oxidations of amitrole and diuron. The catalytic rate constants were 4.55 x 10(3) M-1 s(-1) and 1.79 x 10(4) M-1 s(-1) for amitrole and diuron, respectively using chronoamperometric studies. The diffusion constants were found to be 1.52 x 10(-4) cm(2) s(-1) and 1.91 x 10(-4) cm(2) s(-1) for diuron and amitrole, respectively. The linear concentration range for both were from 5.0 x 10(-5) to 1.0 x 10(-4) M and sensitivities of 0.6603 mu A/mu M and 0.6641 mu A/mu M for amitrole and diuron, with corresponding limits of detection of 2.15 x 10(-7) and 2.6 x 10(-7) M using the 3 delta notation, respectively. (C) 2009 Elsevier Ltd. All rights reserved.
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