Determination of metribuzin content in pesticide formulations using electroanalytical methodology

Abstract

The work presents results of the determination of metribuzin content in commercial pesticide formulations by applying chronopotentiometry with thin film mercury electrode as an electrochemical sensor. In the analyzed pesticide formulations, a single well defined reduction peak of metribuzin is observed at the potential around -880 mV. The content of the herbicide in commercial formulations is determined using the calibration curve method, by applying the initial potential of -0.21 V, and the final potential of -1.10 V. Recovery values based on the declared and found content of the active ingredient are in the range from 100.67% to 101.68%, with the values of relative standard deviation lower than 1.00%, indicating high accuracy and precision of the presented method. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. III 46009]

Keywords

• metribuzin
• chronopotentiometry
• thin film mercury electrode
• commercial formulation