Issue 5, 2011

Electroanalytical determination of carbendazim by square wave adsorptive stripping voltammetry with a multiwalled carbon nanotubes modified electrode

Abstract

A preconcentrating/voltammetric multiwalled carbon nanotube modified glassy carbon electrode (MWCNT–GCE) has been developed for stripping analysis of carbendazim (Methyl Benzimidazol-2-yl Carbamate—MBC), based on dispersing MWCNT in water. The effect of experimental variables, such as the dispersion and loading of MWCNT, was assessed. A quasi-reversible behavior for MBC in acetic acid/acetate buffer 0.1 mol L−1 (pH 4.7) was verified and its high effective pre-concentration was attributed to the high adsorption capability and enormous surface area of the MWCNT. No evidence of carry-over effect, combined with the easiness of electrode preparation, led to the development of a highly sensitive and reliable method with an experimental work range from 0.256 to 3.11 µmol L−1 with a detection limit of 10.5 ppb for a short (60 s) accumulation period. Measurement of MBC in a river water sample was demonstrated. The accuracy of the method for real sample analysis was assessed by estimating the apparent recovery (93 ± 2.9% and 86 ± 4.1% for 4.3 × 10−7 mol L−1) for a MBC spiked river water sample.

Graphical abstract: Electroanalytical determination of carbendazim by square wave adsorptive stripping voltammetry with a multiwalled carbon nanotubes modified electrode

Article information

Article type
Technical Note
Submitted
29 Nov 2010
Accepted
15 Mar 2011
First published
13 Apr 2011

Anal. Methods, 2011,3, 1202-1206

Electroanalytical determination of carbendazim by square wave adsorptive stripping voltammetry with a multiwalled carbon nanotubes modified electrode

W. F. Ribeiro, T. M. G. Selva, I. C. Lopes, E. C. S. Coelho, S. G. Lemos, F. Caxico de Abreu, V. Bernardo do Nascimento and M. C. Ugulino de Araújo, Anal. Methods, 2011, 3, 1202 DOI: 10.1039/C0AY00723D

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