Voltammetric analysis of mancozeb and its degradation product ethylenethiourea
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10400.22/7245 |
Resumo: | The purpose of this work was to develop a reliable alternative method for the determination of the dithiocarbamate pesticide mancozeb (MCZ) in formulations. Furthermore, a method for the analysis of MCZ's major degradation product, ethylenethiourea (ETU), was also proposed. Cyclic voltammetry was used to characterize the electrochemical behavior of MCZ and ETU, and square-wave adsorptive stripping voltammetry (SWAdSV) was employed for MCZ quantification in commercial formulations. It was found that both MCZ and ETU are irreversibly reduced (− 0.6 V and − 0.5 V vs Ag/AgCl, respectively) at the surface of a glassy carbon electrode in a mainly diffusion-controlled process, presenting maximum peak current intensities at pH 7.0 (in phosphate buffered saline electrolyte). Several parameters of the SWAdSV technique were optimized and linear relationships between concentration and peak current intensity were established between 10–90 μmol L− 1 and 10–110 μmol L− 1 for MCZ and ETU, respectively. The limits of detection were 7.0 μmol L− 1 for MCZ and 7.8 μmol L− 1 for ETU. The optimized method for MCZ was successfully applied to the quantification of this pesticide in two commercial formulations. The developed procedures provided accurate and precise results and could be interesting alternatives to the established methods for quality control of the studied products, as well as for analysis of MCZ and ETU in environmental samples. |
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Voltammetric analysis of mancozeb and its degradation product ethylenethioureaMancozebEthylenethioureaCyclic voltammetrySquare-wave adsorptive stripping voltammetryThe purpose of this work was to develop a reliable alternative method for the determination of the dithiocarbamate pesticide mancozeb (MCZ) in formulations. Furthermore, a method for the analysis of MCZ's major degradation product, ethylenethiourea (ETU), was also proposed. Cyclic voltammetry was used to characterize the electrochemical behavior of MCZ and ETU, and square-wave adsorptive stripping voltammetry (SWAdSV) was employed for MCZ quantification in commercial formulations. It was found that both MCZ and ETU are irreversibly reduced (− 0.6 V and − 0.5 V vs Ag/AgCl, respectively) at the surface of a glassy carbon electrode in a mainly diffusion-controlled process, presenting maximum peak current intensities at pH 7.0 (in phosphate buffered saline electrolyte). Several parameters of the SWAdSV technique were optimized and linear relationships between concentration and peak current intensity were established between 10–90 μmol L− 1 and 10–110 μmol L− 1 for MCZ and ETU, respectively. The limits of detection were 7.0 μmol L− 1 for MCZ and 7.8 μmol L− 1 for ETU. The optimized method for MCZ was successfully applied to the quantification of this pesticide in two commercial formulations. The developed procedures provided accurate and precise results and could be interesting alternatives to the established methods for quality control of the studied products, as well as for analysis of MCZ and ETU in environmental samples.ElsevierRepositório Científico do Instituto Politécnico do PortoLópez-Fernández, OlallaBarroso, M. FátimaFernandes, Diana M.Rial-Otero, RaquelSimal-Gándara, JesúsMorais, SimoneNouws, Henri P.A.Freire, CristinaDelerue-Matos, Cristina2015-12-23T15:33:18Z2015-122015-12-01T00:00:00Zinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10400.22/7245eng10.1016/j.jelechem.2015.08.030metadata only accessinfo:eu-repo/semantics/openAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2023-03-13T12:47:44Zoai:recipp.ipp.pt:10400.22/7245Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-19T17:27:47.863667Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
title |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
spellingShingle |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea López-Fernández, Olalla Mancozeb Ethylenethiourea Cyclic voltammetry Square-wave adsorptive stripping voltammetry |
title_short |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
title_full |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
title_fullStr |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
title_full_unstemmed |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
title_sort |
Voltammetric analysis of mancozeb and its degradation product ethylenethiourea |
author |
López-Fernández, Olalla |
author_facet |
López-Fernández, Olalla Barroso, M. Fátima Fernandes, Diana M. Rial-Otero, Raquel Simal-Gándara, Jesús Morais, Simone Nouws, Henri P.A. Freire, Cristina Delerue-Matos, Cristina |
author_role |
author |
author2 |
Barroso, M. Fátima Fernandes, Diana M. Rial-Otero, Raquel Simal-Gándara, Jesús Morais, Simone Nouws, Henri P.A. Freire, Cristina Delerue-Matos, Cristina |
author2_role |
author author author author author author author author |
dc.contributor.none.fl_str_mv |
Repositório Científico do Instituto Politécnico do Porto |
dc.contributor.author.fl_str_mv |
López-Fernández, Olalla Barroso, M. Fátima Fernandes, Diana M. Rial-Otero, Raquel Simal-Gándara, Jesús Morais, Simone Nouws, Henri P.A. Freire, Cristina Delerue-Matos, Cristina |
dc.subject.por.fl_str_mv |
Mancozeb Ethylenethiourea Cyclic voltammetry Square-wave adsorptive stripping voltammetry |
topic |
Mancozeb Ethylenethiourea Cyclic voltammetry Square-wave adsorptive stripping voltammetry |
description |
The purpose of this work was to develop a reliable alternative method for the determination of the dithiocarbamate pesticide mancozeb (MCZ) in formulations. Furthermore, a method for the analysis of MCZ's major degradation product, ethylenethiourea (ETU), was also proposed. Cyclic voltammetry was used to characterize the electrochemical behavior of MCZ and ETU, and square-wave adsorptive stripping voltammetry (SWAdSV) was employed for MCZ quantification in commercial formulations. It was found that both MCZ and ETU are irreversibly reduced (− 0.6 V and − 0.5 V vs Ag/AgCl, respectively) at the surface of a glassy carbon electrode in a mainly diffusion-controlled process, presenting maximum peak current intensities at pH 7.0 (in phosphate buffered saline electrolyte). Several parameters of the SWAdSV technique were optimized and linear relationships between concentration and peak current intensity were established between 10–90 μmol L− 1 and 10–110 μmol L− 1 for MCZ and ETU, respectively. The limits of detection were 7.0 μmol L− 1 for MCZ and 7.8 μmol L− 1 for ETU. The optimized method for MCZ was successfully applied to the quantification of this pesticide in two commercial formulations. The developed procedures provided accurate and precise results and could be interesting alternatives to the established methods for quality control of the studied products, as well as for analysis of MCZ and ETU in environmental samples. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-12-23T15:33:18Z 2015-12 2015-12-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10400.22/7245 |
url |
http://hdl.handle.net/10400.22/7245 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1016/j.jelechem.2015.08.030 |
dc.rights.driver.fl_str_mv |
metadata only access info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
metadata only access |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
instname_str |
Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
instacron_str |
RCAAP |
institution |
RCAAP |
reponame_str |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
collection |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
repository.name.fl_str_mv |
Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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