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Voltammetry with Non-aqueous Media as a Tool for Sensitive Determination of Fungicides Folpet and Captan

Authors: Ševčík Michal | Janíková Lenka | Vobořil Jakub | Žemlová Lucie | Matvieiev Oleksandr | Šelešovská Renáta

Year: 2025

Type of publication: ostatní - přednáška nebo poster

Page from-to: nestránkováno

Titles:

Language	Name	Abstract	Keywords
eng	Voltammetry with Non-aqueous Media as a Tool for Sensitive Determination of Fungicides Folpet and Captan	In polarography, one of the most important discoveries in the field of chemistry made in the Czech Republic, the current flow and its changes are recorded when the controlled-changed voltage is applied to a 2-electrode system. Polarography uses non-stationary working electrodes based on a mercury drop. Nowadays, voltammetry with stationary electrodes is more frequently used. Voltammetry is typically performed in aqueous supporting electrolytes formed by solutions with high conductivity and components which do not undergo electrolysis during analysis. Nevertheless, voltammetry in non-aqueous supporting electrolytes made of an organic solvent and an additional ionic component is less described. Organic solvents can be advantageous for hydrolysing analytes or for direct extraction from organic samples. Electroreductions of fungicides folpet (FLP) and captan (CPT) were studied on a glassy-carbon electrode (GCE) as a working electrode in 0.1 M LiClO4 dimethylformamide (DMF) solution. FLP provided three significant reductional signals, CPT provided one signal. The analytical application of differential pulse voltammetry was verified, with a detection limit of 0.8 μM for FLP and 0.4 μM for CPT, which was low than the detection limits of the recent polarographic method with aqueous supporting electrolyte1.	Voltammetry, Polarography, Non-aqueous electrolyte, Fungicides, Folpet, Captan