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Sensors 2017, 17(9), 2033; https://doi.org/10.3390/s17092033

Simultaneous Voltammetric Detection of Carbaryl and Paraquat Pesticides on Graphene-Modified Boron-Doped Diamond Electrode

1
Department of Applied Chemistry and Environmental Engineering and Inorganic Compounds, Politehnica University of Timisoara, P-ta Victoriei No. 2, 300006 Timisoara, Romania
2
Faculty of Applied Sciences, Department of Chemical Technology, Section Materials for Energy Conversion and Storage, Delft University of Technology, Lorentzweg 1, 2628 CJ Delft, The Netherlands
*
Author to whom correspondence should be addressed.
Received: 5 August 2017 / Revised: 2 September 2017 / Accepted: 4 September 2017 / Published: 6 September 2017
(This article belongs to the Special Issue Carbon Materials Based Sensors and the Application)
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Abstract

Monitoring of pesticide residues in food, beverages, and the environment requires fast, versatile, and sensitive analyzing methods. Direct electrochemical detection of pesticides could represent an efficient solution. Adequate electrode material, electrochemical technique, and optimal operation parameters define the detection method for practical application. In this study, cyclic voltammetric and differential pulse voltammetric techniques were used in order to individually and simultaneously detect two pesticides, i.e., carbaryl (CR) and paraquat (PQ), from an acetate buffer solution and also from natural apple juice. A graphene-modified boron-doped diamond electrode, denoted BDDGR, was obtained and successfully applied in the simultaneous detection of CR and PQ pesticides, using the differential pulse voltammetric technique with remarkable electroanalytical parameters in terms of sensitivity: 33.27 μA μM−1 cm−2 for CR and 31.83 μA μM−1 cm−2 for PQ. These outstanding results obtained in the acetate buffer supporting electrolyte allowed us to simultaneously detect the targeted pesticides in natural apple juice. View Full-Text
Keywords: direct electrochemical detection; carbaryl; paraquat; simultaneous detection; pesticide residues; natural juice direct electrochemical detection; carbaryl; paraquat; simultaneous detection; pesticide residues; natural juice
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Pop, A.; Manea, F.; Flueras, A.; Schoonman, J. Simultaneous Voltammetric Detection of Carbaryl and Paraquat Pesticides on Graphene-Modified Boron-Doped Diamond Electrode. Sensors 2017, 17, 2033.

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