Please use this identifier to cite or link to this item:
http://nopr.niscpr.res.in/handle/123456789/18192| Title: | Determination of electrochemical properties of the adsorbed zearalanone mycotoxin by using cyclic and square wave voltammetry |
| Authors: | Molina, Patricia Gabriela Zon, Marfa Alicia Femandez, Hector |
| Issue Date: | Apr-2003 |
| Publisher: | NISCAIR-CSIR, India |
| Abstract: | The electro-oxidation of zearalanone (ZEA)
adsorbed on glassy carbon electrodes in 20% acetonitrile (ACN) + 80% 1 M HClO4
aqueous solution has been studied for the first time by using cyclic and square
wave voltammetry. Experimental results clearly demonstrate the surface nature
of the electrochemical reaction. The optimum accumulation potential (Eacc)
and
optimum accumulation time (tacc)
are 0 V and 2 min, respectively. Quantitative determination of ZEA has been performed
by Square Wave Voltammetry. Linear calibration curves have been obtained from the
net peak current (Ip,n) versus c*ZEA in the
concentration range from 2×10-7- 1.5 ×10-5 M with a
detection limit of 2×10-7 M at a signal to noise ratio of 2: 1. Cyclic and square wave voltammograms show an ECirrev mechanism to be the most probable mechanism to describe the surface electrochemical reaction. The dependence between I p,n and Ep.n on the logarithm of acid bulk concentration indicates a deprotonation reaction to should be the fast follow-up chemical reaction coupled to the initial electron transfer reaction. |
| Page(s): | 789-796 |
| ISSN: | 0975-0975(Online); 0376-4710(Print) |
| Appears in Collections: | IJC-A Vol.42A(04) [April 2003] |
Files in This Item:
| File | Description | Size | Format | |
|---|---|---|---|---|
| IJCA 42A(4) 789-796.pdf | 1.82 MB | Adobe PDF | View/Open |
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