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Issue 5, 2011
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Electroanalytical determination of carbendazim by square wave adsorptive stripping voltammetry with a multiwalled carbon nanotubes modified electrode

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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

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Publication details

The article was received on 29 Nov 2010, accepted on 15 Mar 2011 and first published on 13 Apr 2011


Article type: Technical Note
DOI: 10.1039/C0AY00723D
Citation: Anal. Methods, 2011,3, 1202-1206

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    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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