Determination of carbendazim with a graphite electrode modified with silicone OV‐17

Abstract

The cyclic voltammetric characterization of a graphite electrode modified with silicone OV-17 was carried out on a solution of ferroine. Afterwards, the electrochemical behavior of carbenddzim following its accumulation on the electrode surface, was studied. Best conditions for its determination in the preconcentration and measurement steps were established. The method, with a relative error of 3.7% and a determination limit of 9.1 ng/mL, was applied for wine, apple and cultivated soil samples.

Redox kinetics in cathodic stripping square‐wave voltammetry

“…As Q: is not known the parameter log (tcZmax) = (-1.3 & 0.9) is used and the calculated rate constant is log (k,) = (0.6 k0.9) and 0.5 < Ic, < 32 cmjs. These results are in agreement with literature data [2,8,9, 221. Square-wave peak currentfrequency relationships reported for sodium sulfide [8] and sulfur containing organic molecules, such as the enzyme adenosine deaminase [2], organophosphorus pesticide dimethoate [9] and bovine serum albumine [22], are either linear [2,8,22] or slightly parabolic [9].…”

“…These results are in agreement with literature data [2,8,9, 221. Square-wave peak currentfrequency relationships reported for sodium sulfide [8] and sulfur containing organic molecules, such as the enzyme adenosine deaminase [2], organophosphorus pesticide dimethoate [9] and bovine serum albumine [22], are either linear [2,8,22] or slightly parabolic [9]. This indicates that redox reactions are either reversible [2,8,22] or quasireversible [9] in the restricted range of applied frequencies (f < 120 s- [2,9,22] or…”

“…The reduction of electrodeposited copper and mercury selenide belongs to the second group of redox reactions with immobilized reactants. Following the reduction a metallic mercury and copper amalgam are formed, while selenide anions diffuse from the electrode surface, in the same way as mercury sulfide [8] and various sulfur containing organic molecules [2,9,22]. Eventual adsorption of selenide anions at the mercury electrode surface which may occur at potentials more negative than the reduction potential, does not influence the redox reaction of copper and mercury.…”

β-Cyclodextrin and multiwalled carbon nanotubes modified boron-doped diamond electrode for voltammetric assay of carbendazim and its corrosion inhibition behavior on stainless steel

“…This fact indicates that the number of the exchanged protons and electrons is equal. Consistent to the earlier elaborated results concerning the oxidation process of Cbz on carbonaceous electrodes [18,51] it can be proposed that the imidazol-2-yl-carbamate part of the Cbz molecule is oxidized via complex, 2e − , 2H + exchanging, E r C i mechanism to imidazole carbonyl derivative.…”

Sensitive Approach for Voltammetric Determination of Carbendazim Based on the Use of an Anionic Surfactant

“…Carbendazim, or methyl benzimidazol‐2‐yl carbamate (MBC), is a toxic class IV systemic fungicide that belongs to benzimidazole chemical group and can be used on plants, seeds or soil for control of a variety of diseases on fruits and vegetables. This compound is long‐time persistent and its degradation occurs slowly 3, 4. MBC has low acute toxicity, however, intake of residues at high concentrations can induce human to cancer 5.…”