Determination of methiocarb pesticide using differential pulse voltammetry with a boron-doped diamond electrode

Abstract

In this article, a simple and rapid method is described for voltammetric determination of methiocarb (MTC, a pesticide of the carbamate type). Direct oxidation of MTC at a highly positive potential of about +1.4 V vs.Ag/AgCl was found to be feasible, thanks to the excellent performance of the working boron-doped diamond electrode in combination with the differential pulse voltammetric ramp. After optimisation of important parameters, the signal of MTC could be calibrated in an interval of 1-55 mg mL À1 MTC, when offering a detection limit (3s) of ca. 0.15 mg mL À1 MTC. The practical applicability of the method has been demonstrated on analyses of a commercial pesticide, either with respect to the total content of MTC or as its gradual and time-controlled dissolution in the model sample of the natural aquatic system.Scheme 1 Methiocarb (MTC).

Mercury-free and modification-free electroanalytical approach towards bromazepam and alprazolam sensing: A facile and efficient assay for their quantification in pharmaceuticals using boron-doped diamond electrodes

“…Electroanalytical methods represent financially unassuming, temporally efficient and sensitive tool for detection and determination of various structurally and biologically interesting substances [12,13]. The literature survey states that hanging mercury drop electrodes (HMDE) [14][15][16] and silver solid amalgam electrode (AgSAE) [17] have been applied to sensitive determination of several BDZs derivatives based on their electrochemical reduction.…”

Analysis of the hydraulic oil to drive band sawmill

“…Decrease of oxygen at the end of the test was of 9.3 % in control and in the interval of 14.3 -24.7 % in samples. Forth et al [30] and Redmann et al [31] tested toxicity of petroleum (mineral) oils in water samples using the standard aquatic toxicity tests and observed changes in the size of oil droplets, too. At the beginning of the test the average droplet size was 5-10 μm (a few were > 30 μm) and after 96 hours of testing, that size was reduced to 3-5 μm.…”

“…Přehled pesticidů, jež byly na našem pracovišti analyzovány, je uveden v tabulce 1 (cit. [28][29][30][31][32][33][34][35][36][37][38] ).…”

Sensitive voltammetric determination of herbicide terbutryn using solid electrodes based on silver amalgam and boron-doped diamond

“…Application of this electrode material in electroanalysis especially of organic compounds has been widely described, e.g., in [44][45][46][47]. Pesticides and their residues are also a large group of substances studied with BDDE, and a number of the papers have been already published on this topic [39,[48][49][50][51].…”