Electrochemical Determination of the Herbicide Bentazone Using a Carbon Nanotube β-Cyclodextrin Modified Electrode

An electrochemical sensor has been developed for the determination of the herbicide bentazone, based on a GC electrode modified by a combination of multiwalled carbon nanotubes (MWCNT) with β‐cyclodextrin (β‐CD) incorporated in a polyaniline film. The results indicate that the β‐CD/MWCNT modified GC...

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Bibliographic Details
Published in:Electroanalysis (New York, N.Y.) N.Y.), 2013-10, Vol.25 (10), p.2360-2366
Main Authors: Rahemi, V., Garrido, J. M. P. J., Borges, F., Brett, C. M. A., Garrido, E. M. P. J.
Format: Article
Language:English
Subjects:
Bentazone
Carbon nanotubes
Herbicides
Voltammetric sensors
β-Cyclodextrin
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Summary:An electrochemical sensor has been developed for the determination of the herbicide bentazone, based on a GC electrode modified by a combination of multiwalled carbon nanotubes (MWCNT) with β‐cyclodextrin (β‐CD) incorporated in a polyaniline film. The results indicate that the β‐CD/MWCNT modified GC electrode exhibits efficient electrocatalytic oxidation of bentazone with high sensitivity and stability. A cyclic voltammetric method to determine bentazone in phosphate buffer solution at pH 6.0, was developed, without any previous extraction, clean‐up, or derivatization steps, in the range of 10–80 µmol L−1, with a detection limit of 1.6 µmol L−1 in water. The results were compared with those obtained by an established HPLC technique. No statistically significant differences being found between both methods.
ISSN:1040-0397
1521-4109
DOI:10.1002/elan.201300230