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Reduction behavior of insecticide azoxystrobin and its voltammetric determination using silver solid amalgam electrode

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Abstract

Electrochemical reduction of systemic fungicide azoxystrobin, used to protect a wide variety of crops, was investigated using cyclic voltammetry with a mercury meniscus-modified silver solid amalgam electrode (m-AgSAE). The mechanism of the electrochemical reduction was proposed and supported with high-performance liquid chromatography/mass spectrometry analysis of azoxystrobin solutions electrolyzed on mercury pool electrode. An analytical method for the determination of azoxystrobin by differential pulse voltammetry with m-AgSAE was developed. A wide linear dynamic range (2.0 × 10−6–5.0 × 10−5 mol dm−3) and low limit of detection (7 × 10−7 mol dm−3) were obtained. The accuracy and repeatability of the proposed method were evaluated by the analysis of model solutions with recovery from 96.0 to 104.0% and relative standard deviation of 5 repeated determinations < 3.5%. Finally, a new voltammetric method using m-AgSAE was successfully applied for azoxystrobin determination in real samples, concretely in spiked river water and pesticide preparations.

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Acknowledgements

This work was supported by the grant project of The Czech Science Foundation (Project No. 17-03868S) by The University of Pardubice (Projects No. SGSFChT_2018_003 and SD373001/82/30350(2016)) and by Palacký University in Olomouc (Project IGA_PrF_2018_027).

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Correspondence to Renáta Šelešovská.

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Šelešovská, R., Herynková, M., Skopalová, J. et al. Reduction behavior of insecticide azoxystrobin and its voltammetric determination using silver solid amalgam electrode. Monatsh Chem 150, 419–428 (2019). https://doi.org/10.1007/s00706-018-2348-y

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  • DOI: https://doi.org/10.1007/s00706-018-2348-y

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