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

2011 ◽  
Vol 3 (5) ◽  
pp. 1202 ◽  
Author(s):  
Williame Farias Ribeiro ◽  
Thiago Matheus Guimarães Selva ◽  
Ilanna Campelo Lopes ◽  
Elaine Cristina S. Coelho ◽  
Sherlan Guimarães Lemos ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Modified Electrode ◽  
Stripping Voltammetry ◽  
Adsorptive Stripping Voltammetry ◽  
Multiwalled Carbon ◽  
Square Wave

scholarly journals Square Wave Voltammetric Determination of Residues of Carbendazim Using a Fullerene/Multiwalled Carbon Nanotubes/Nafion®/Coated Glassy Carbon Electrode

2016 ◽  
Vol 2016 ◽  
pp. 1-9 ◽  
Author(s):  
Djimadoum N. Teadoum ◽  
Seraphine K. Noumbo ◽  
Kamdem T. Arnaud ◽  
Temgoua T. Ranil ◽  
Antoine D. Mvondo Zé ◽  
...  
Keyword(s):  
Carbon Nanotubes ◽  
Multiwalled Carbon Nanotubes ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Optimum Conditions ◽  
Multiwalled Carbon ◽  
Square Wave ◽  
Voltammetric Behavior

A glassy carbon electrode (GCE) was modified with a fullerene/Multiwalled Carbon Nanotubes (MWCNTs)/Nafion composite and applied to the determination of carbendazim, a fungicide. The voltammetric behavior of the analyte was investigated using Cyclic Voltammetry (CV), on the bare GCE and on the same electrode coated by a thin film of the composite material. The electrode response was more than fourfold important on the modified electrode, due to electrical conductivity of fullerene and MWCNT and to favorable electrostatic interaction between the negatively charged Nafion and the protonated fungicide. A sensitive electroanalytical procedure based on Square Wave Voltammetry (SWV) was then developed to detect the analyte. Under the optimum conditions, a linear relationship was obtained between the peak current and the concentration of carbendazim, in the range from 2.0 × 10−8 mol/L to 3.5 × 10−7 mol/L, leading to a detection limit of 1.7 × 10−8 mol/L and to a quantification limit of 5.57 × 10−8 mol/L. The developed procedure was successfully applied to detect carbendazim upon adsorption by some ferritic soils.

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