Electroanalytical determination of carbendazim and fenamiphos in natural waters using a diamond electrode

In this study, a method for electroanalytical determination of carbendazim (CBZ) and fenamiphos (FNP) in natural and spiked water was developed using square wave voltammetry in Na2HPO4 0.1 mol L− 1 as supporting electrolyte. The calibration curve for carbendazim detection presented good linearity in the concentration range of 0.50 to 15.0 μM, with a sensitivity of 0.080 A/mol L− 1 and a linearity of 0.998. The oxidation of fenamiphos on BDD electrode shows a dynamic range of concentration of 0.5 to 25.0 μM and sensibility of 0.14 A/mol L− 1. The recovery experiments showed values between 70 and 100% for spiked samples thus indicating the feasibility of the electroanalytical methodology to quantify CBZ and FNP in pure or natural waters.

► Determination of pesticides in natural waters.
► Evaluation of electrochemical behavior of pesticides CBZ and FNP on BDD electrode.s
► Diamond electrodes applied for pesticide determination in natural and spiked water.
► The BDD electrodes have a superior performance in contaminated samples.