Electrochemical behavior of formetanate and chlordimeform pesticides

Subbalakshmamma, M.; Reddy, S.

doi:10.1002/elan.1140060716

Cited by 6 publications

(1 citation statement)

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“…FMT is a carbamate pesticide miticide/insecticide authorized to be used on several fruits and nonagricultural uncultivated areas/soils [37,38]. Its quantification was rarely performed by electrochemical techniques, being only made by the conventional hanging mercury drop electrode [39], and more recently with the glassy carbon modified with cobalt phthalocyanine and functionalized multiwalled carbon nanotubes [40], and also by three different laccase-based biosensors electrochemical biosensor [14,41,42]. Thus, the main goal of this study was to characterize the electrochemical behavior of FMT on BDDE (cathodically pretreated) and subsequently optimize a simple, sensitive, accurate and inexpensive electroanalytical procedure for FMT sensing in fruits.…”

Section: Introductionmentioning

confidence: 99%

Sensing of formetanate pesticide in fruits with a boron-doped diamond electrode

Ribeiro

Sousa

Morais

et al. 2018

Microchemical Journal

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This study describes the development of a simple and accurate methodology for carbamate pesticide formetanate (FMT) analysis in fruits based on the use of a boron-diamond doped electrode (BDDE) cathodically pretreated and on the forward component of the current of square-wave voltammetry (SWV). FMT exhibits a well-defined irreversible oxidation process, which reaction mechanism is diffusion-controlled, involves the participation of one electron and is influenced by the electrolyte pH. However, protonation does not participate in the ratedetermining step in the redox process. The optimum experimental and voltammetric conditions were pH 7.0 (0.04 mol L −1 Britton-Robinson buffer), pulse potential frequency of 20 s −1 , amplitude of the pulse of 25 mV, and height of the potential step of 3 mV. Under the optimum conditions, calibration curve was linear from 4.98 × 10 −7 to 1.70 × 10 −5 mol L −1 FMT with a limit of detection of 3.7 × 10 −7 mol L −1. FMT sensing was performed in different fruits (mango and grape). Recoveries ranged from 95.2 ± 2.8 to 104.0 ± 3.5% for mango and 96.5 ± 2.5 to 105.2 ± 3.5% for grape proving the accuracy and precision of the electroanalytical methodology. The attained data validated the applicability of the developed approach for FMT quantification in fruits.

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