- Title
- Comparison of carbon screen-printed and disk electrodes in the detection of antioxidants using CoPc derivatives
- Creator
- Matemadombo, Fungisai
- Creator
- Apetrei, Constantin
- Creator
- Nyokong, Tebello
- Creator
- Rodríguez-Méndez, María Luz
- Creator
- de Saja, José Antonio
- Subject
- To be catalogued
- Date Issued
- 2012
- Date
- 2012
- Type
- text
- Type
- article
- Identifier
- http://hdl.handle.net/10962/244371
- Identifier
- vital:51251
- Identifier
- xlink:href="https://doi.org/10.1016/j.snb.2012.02.088"
- Description
- Cobalt phthalocyanine (CoPc) and cobalt phthalocyanine carboxylic derivatives (CoTCPc and CoOCPc) have been used as electrocatalysts for the detection of the antioxidants vanillic acid, caffeic acid, pyrogallol, and ascorbic acid on screen-printed carbon and disk electrode surfaces. The cobalt phthalocyanines were used to detect vanillic acid (with limit of detection ranging from 1.15 μM to 2.42 μM at potentials of 0.55–0.88 V vs. Ag|AgCl), caffeic acid (with limit of detection ranging from 1.17 μM to 2.20 μM at potentials of 0.30–0.81 V vs. Ag|AgCl), pyrogallol (with limit of detection ranging from 1.16 μM to 3.63 μM at potentials of 0.52–0.63 V vs. Ag|AgCl), and ascorbic acid (with limit of detection ranging from 1.16 μM to 1.58 μM at potentials of 0.34–0.46 V vs. Ag|AgCl). The kinetic studies also demonstrate diffusion-controlled processes at the electrode surface. The SPCE electrodes have better detection properties towards vanillic acid, caffeic acid, pyrogallol while the disk electrodes had better ascorbic acid detection properties as proven by kinetic studies. Both types CoPc-influenced electrodes show 100% discrimination of the antioxidants.
- Format
- computer
- Format
- online resource
- Format
- application/pdf
- Format
- 1 online resource (10 pages)
- Format
- Publisher
- Elsevier
- Language
- English
- Relation
- Sensors and Actuators B: Chemical
- Relation
- Matemadombo, F., Apetrei, C., Nyokong, T., Rodríguez-Méndez, M.L. and de Saja, J.A., 2012. Comparison of carbon screen-printed and disk electrodes in the detection of antioxidants using CoPc derivatives. Sensors and Actuators B: Chemical, 166, pp.457-466
- Relation
- Sensors and Actuators B: Chemical volume 166 p. 457 2012 0925-4005
- Rights
- Publisher
- Rights
- Use of this resource is governed by the terms and conditions of the Elsevier Terms and Conditions Statement (https://www.elsevier.com/legal/elsevier-website-terms-and-conditions)
- Rights
- Closed Access
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Nyokong, Tebello (Distinguished Professor)
RU DST/NRF SARChI for Medicinal Chemistry and Nanotechnology
RU Department of Chemistry
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