Boron-doped diamond electrode acting as a voltammetric sensor for the detection of methomyl pesticide

Standard methods for the detection of carbamate pesticides are expensive, time-consuming, and require highly trained employees. Thus, electroanalytical methods are considered to be rapid, simple and low-cost alternatives. Here, we develop sensitive voltammetric methods for the determination of metho...

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Bibliographic Details
Published in:Journal of electroanalytical chemistry (Lausanne, Switzerland) Switzerland), 2017-03, Vol.789, p.100-107
Main Authors: Costa, Daniel J.E., Santos, Janete C.S., Sanches-Brandão, Fatima A.C., Ribeiro, Williame F., Salazar-Banda, Giancarlo R., Araujo, Mario C.U.
Format: Article
Language:English
Subjects:
Boron
Carbamate pesticide
Diamonds
Differential pulse voltammetry
Drinking water
Electroanalytical determination
Electrodes
Electrolytes
Formulations
Oxidation
Pesticides
Sensitivity analysis
Sensors
Square wave voltammetry
Square waves
Voltammetry
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Summary:Standard methods for the detection of carbamate pesticides are expensive, time-consuming, and require highly trained employees. Thus, electroanalytical methods are considered to be rapid, simple and low-cost alternatives. Here, we develop sensitive voltammetric methods for the determination of methomyl (a carbamate pesticide) using a bare boron-doped diamond electrode, square wave voltammetry (SWV), differential pulse voltammetry (DPV) and Britton–Robinson buffer (pH2.0) as supporting electrolyte. Methomyl has three oxidation processes: meantime process P1 was chosen for the analytical determination due to its higher sensitivity in comparison with other processes. The detection limits and concentration ranges of the SWV and DPV methods were 1.9×10−5 and 1.2×10−6molL−1, and 6.6–42.0×10−5 to 5.0–410.0×10−6molL−1, respectively. The proposed methods were successfully applied in river water, tap water and commercial formulations showcasing >80% mean recoveries. Comparing the two techniques, DPV was seen as the most sensitive method. [Display omitted] •A Boron-doped diamond electrode was used as voltammetric sensor to detect methomyl.•Mass electronic transfer, pH effect, and scan rate, were among others parameters were studied.•Precise and accurate square wave and differential pulse voltammetric methods were developed.•Methomyl was successively determined in a commercial formulation, river and tap water.
ISSN:1572-6657
1873-2569
DOI:10.1016/j.jelechem.2017.02.036