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Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples

A new electrochemical method for determination of imidacloprid using chronopotentiometry on thin film mercury and glassy carbon electrode was presented. The most important experimental parameters of chronopotentiometry were examined and optimized with respect to imidacloprid analytical signal. Imida...

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Autores principales: Đurović, Ana, Stojanović, Zorica, Kravić, Snežana, Grahovac, Nada, Bursić, Vojislava, Vuković, Gorica, Suturović, Zvonimir
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4799820/
https://www.ncbi.nlm.nih.gov/pubmed/27042181
http://dx.doi.org/10.1155/2016/5138491
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author Đurović, Ana
Stojanović, Zorica
Kravić, Snežana
Grahovac, Nada
Bursić, Vojislava
Vuković, Gorica
Suturović, Zvonimir
author_facet Đurović, Ana
Stojanović, Zorica
Kravić, Snežana
Grahovac, Nada
Bursić, Vojislava
Vuković, Gorica
Suturović, Zvonimir
author_sort Đurović, Ana
collection PubMed
description A new electrochemical method for determination of imidacloprid using chronopotentiometry on thin film mercury and glassy carbon electrode was presented. The most important experimental parameters of chronopotentiometry were examined and optimized with respect to imidacloprid analytical signal. Imidacloprid provided well-defined reduction peak in Britton-Robinson buffer on thin film mercury electrode at −1.0 V (versus Ag/AgCl (KCl, 3.5 mol/L)) and on glassy carbon electrode at −1.2 V (versus Ag/AgCl (KCl, 3.5 mol/L)). The reduction time was linearly proportional to concentrations from 0.8 to 30.0 mg/L on thin film mercury electrode and from 7.0 to 70.0 mg/L on glassy carbon electrode. The detection limits were 0.17 mg/L and 0.93 mg/L for thin film mercury and glassy carbon electrode, respectively. The estimation of method precision as a function of repeatability and reproducibility showed relative standard deviations values lower than 3.73%. Recovery values from 97.3 to 98.1% confirmed the accuracy of the proposed method, while the constancy of the transition time with deliberated small changes in the experimental parameters indicated a very good robustness. A minor influence of possible interfering compounds proved good selectivity of the method. Developed method was applied for imidacloprid determination in commercial pesticide formulations and river water samples.
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spelling pubmed-47998202016-04-03 Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples Đurović, Ana Stojanović, Zorica Kravić, Snežana Grahovac, Nada Bursić, Vojislava Vuković, Gorica Suturović, Zvonimir Int J Anal Chem Research Article A new electrochemical method for determination of imidacloprid using chronopotentiometry on thin film mercury and glassy carbon electrode was presented. The most important experimental parameters of chronopotentiometry were examined and optimized with respect to imidacloprid analytical signal. Imidacloprid provided well-defined reduction peak in Britton-Robinson buffer on thin film mercury electrode at −1.0 V (versus Ag/AgCl (KCl, 3.5 mol/L)) and on glassy carbon electrode at −1.2 V (versus Ag/AgCl (KCl, 3.5 mol/L)). The reduction time was linearly proportional to concentrations from 0.8 to 30.0 mg/L on thin film mercury electrode and from 7.0 to 70.0 mg/L on glassy carbon electrode. The detection limits were 0.17 mg/L and 0.93 mg/L for thin film mercury and glassy carbon electrode, respectively. The estimation of method precision as a function of repeatability and reproducibility showed relative standard deviations values lower than 3.73%. Recovery values from 97.3 to 98.1% confirmed the accuracy of the proposed method, while the constancy of the transition time with deliberated small changes in the experimental parameters indicated a very good robustness. A minor influence of possible interfering compounds proved good selectivity of the method. Developed method was applied for imidacloprid determination in commercial pesticide formulations and river water samples. Hindawi Publishing Corporation 2016 2016-03-06 /pmc/articles/PMC4799820/ /pubmed/27042181 http://dx.doi.org/10.1155/2016/5138491 Text en Copyright © 2016 Ana Đurović et al. https://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Đurović, Ana
Stojanović, Zorica
Kravić, Snežana
Grahovac, Nada
Bursić, Vojislava
Vuković, Gorica
Suturović, Zvonimir
Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
title Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
title_full Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
title_fullStr Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
title_full_unstemmed Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
title_short Development and Validation of Chronopotentiometric Method for Imidacloprid Determination in Pesticide Formulations and River Water Samples
title_sort development and validation of chronopotentiometric method for imidacloprid determination in pesticide formulations and river water samples
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4799820/
https://www.ncbi.nlm.nih.gov/pubmed/27042181
http://dx.doi.org/10.1155/2016/5138491
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