Simple,Rapid and Sensitive Electrochemical Method for the Determination of the Triketone Herbicide Sulcotrione in River Water Using a Glassy Carbon Electrode |
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| Authors: | Dalibor M Stankovi? Eda Mehmeti Lubomir Svorc Kurt Kalcher |
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| Institution: | 1. Innovation center of the Faculty of Chemistry, University of Belgrade, Studentski trg 12‐16, Belgrade phone: +38111?3336829, fax: +38111?639537;2. Institute of Chemistry – Analytical Chemistry, Karl‐Franzens University Graz, A‐8010 Graz, Austria;3. Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology in Bratislava, SK‐812 37, Bratislava, Slovak Republic |
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| Abstract: | We report a novel, simple, rapid and sensitive electrochemical method for the determination of sulcotrione, a member of the relatively new class of triketone herbicides, using differential pulse voltammetry on a glassy carbon electrode. Its electrochemical behavior including influences of electrolyte composition, pH and scan rate was studied to select optimal experimental parameters for its determination. In Britton? Robinson buffer at pH 3 sulcotrione provided a well‐defined reduction peak at ?0.84 V (vs. Ag/AgCl electrode), with good repeatability (relative standard deviation of 2.3 % for 8 measurements at 10 µM concentration level). With optimized parameters differential pulse voltammetry rendered two linear concentration ranges from 0.2 to 2 µM and from 2 to 50 µM with a detection limit of 0.05 µM. The proposed procedure was successfully applied to the determination of sulcotrione in spiked river water samples with satisfactory recoveries (93–109 %). The developed method may represent a simple, rapid and sensitive alternative to highly toxic mercury electrodes and chromatographic methods. |
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| Keywords: | Sulcotrione Differential pulse voltammetry Glassy carbon electrode |
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