Please use this identifier to cite or link to this item: https://open.uns.ac.rs/handle/123456789/4789
Title: A simple and rapid electrochemical sensing method for metribuzin determination in tap and river water samples
Authors: Stojanović, Zorica 
Đurović, Ana 
Kravić, Snežana 
Grahovac, Nada
Suturović, Zvonimir 
Bursić, Vojislava 
Vuković, Gorica
Brezo, Tanja 
Issue Date: 28-Mar-2016
Publisher: Royal Society of Chemistry
Journal: Analytical Methods
Abstract: © 2016 The Royal Society of Chemistry. This paper describes an electroanalytical method for the determination of metribuzin using a thin film mercury electrode by chronopotentiometry. Research included optimization of the most important parameters of chronopotentiometric analysis and the best responses were achieved in Britton-Robinson buffer at pH 5.0, using an initial potential of -0.21 V, ending potential of -1.1 V, and reduction current in the range from -4 μA to -15 μA. Under these conditions, metribuzin was reduced in an irreversible electrode reaction process with one well-defined reduction wave at -0.83 V (vs. Ag/AgCl, KCl, 3.5 mol dm-3). A linear response was observed for three concentration ranges 1-5, 5-15 and 15-30 mg dm-3, with an achieved limit of detection of 0.042 mg dm-3. The precision was determined as a function of repeatability and reproducibility, which showed relative standard deviation values not higher than 3.18%. Various interfering substances did not interfere with metribuzin determination. The proposed method was successfully applied to tap and river water samples. The recovery values obtained for spiked river water samples were in good statistical agreement with those obtained by the LC-MS/MS method. Accordingly, the proposed chronopotentiometric methodology can be conveniently applied in the quality control of environmental water samples as a simple, sensitive, reliable and low cost method.
URI: https://open.uns.ac.rs/handle/123456789/4789
ISSN: 17599660
DOI: 10.1039/c5ay03243a
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