Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Journal of the Brazilian Chemical Society (Online) |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000100016 |
Resumo: | This paper describes an electroanalytical methodology using square-wave adsorptive voltammetry, which has been successfully applied for the direct determination of dexamethasone residues in raw natural waters used for the public supply of the Ceará State, Brazil. The obtained detection limits ranged from 7.47 × 10-9 to 1.80 × 10-8 mol L-1 for the three matrices of raw natural waters evaluated. High percentages of average recovery (98.86% ± 0.72), repeatability (0.32% ± 0.05) and reproducibility (0.91% ± 0.20) were obtained in these samples, reaffirming the sensitivity of the procedure. Energy of the LUMO orbitals and Müllikens atomic charges were calculated using the functional BLYP/DNP. The theoretical results allied to the diagnostic criteria of the square-wave voltammetry indicate that the dexamethasone redox mechanism is associated to the quasi-reversible and irreversible reduction process of the ketone groups located at C-20 and C-3, respectively. |
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Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural watersdexamethasoneraw natural watersdirect analysissquare-wave adsorptive voltammetryThis paper describes an electroanalytical methodology using square-wave adsorptive voltammetry, which has been successfully applied for the direct determination of dexamethasone residues in raw natural waters used for the public supply of the Ceará State, Brazil. The obtained detection limits ranged from 7.47 × 10-9 to 1.80 × 10-8 mol L-1 for the three matrices of raw natural waters evaluated. High percentages of average recovery (98.86% ± 0.72), repeatability (0.32% ± 0.05) and reproducibility (0.91% ± 0.20) were obtained in these samples, reaffirming the sensitivity of the procedure. Energy of the LUMO orbitals and Müllikens atomic charges were calculated using the functional BLYP/DNP. The theoretical results allied to the diagnostic criteria of the square-wave voltammetry indicate that the dexamethasone redox mechanism is associated to the quasi-reversible and irreversible reduction process of the ketone groups located at C-20 and C-3, respectively.Sociedade Brasileira de Química2012-01-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000100016Journal of the Brazilian Chemical Society v.23 n.1 2012reponame:Journal of the Brazilian Chemical Society (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0103-50532012000100016info:eu-repo/semantics/openAccessOliveira,Thiago M. B. F.Ribeiro,Francisco W. P.do Nascimento,Jefferson M.Soares,Janete E. S.Freire,Valder N.Becker,HelenaLima-Neto,Pedro deCorreia,Adriana N.eng2012-02-02T00:00:00Zoai:scielo:S0103-50532012000100016Revistahttp://jbcs.sbq.org.brONGhttps://old.scielo.br/oai/scielo-oai.php||office@jbcs.sbq.org.br1678-47900103-5053opendoar:2012-02-02T00:00Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ)false |
dc.title.none.fl_str_mv |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
title |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
spellingShingle |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters Oliveira,Thiago M. B. F. dexamethasone raw natural waters direct analysis square-wave adsorptive voltammetry |
title_short |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
title_full |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
title_fullStr |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
title_full_unstemmed |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
title_sort |
Direct electrochemical analysis of dexamethasone endocrine disruptor in raw natural waters |
author |
Oliveira,Thiago M. B. F. |
author_facet |
Oliveira,Thiago M. B. F. Ribeiro,Francisco W. P. do Nascimento,Jefferson M. Soares,Janete E. S. Freire,Valder N. Becker,Helena Lima-Neto,Pedro de Correia,Adriana N. |
author_role |
author |
author2 |
Ribeiro,Francisco W. P. do Nascimento,Jefferson M. Soares,Janete E. S. Freire,Valder N. Becker,Helena Lima-Neto,Pedro de Correia,Adriana N. |
author2_role |
author author author author author author author |
dc.contributor.author.fl_str_mv |
Oliveira,Thiago M. B. F. Ribeiro,Francisco W. P. do Nascimento,Jefferson M. Soares,Janete E. S. Freire,Valder N. Becker,Helena Lima-Neto,Pedro de Correia,Adriana N. |
dc.subject.por.fl_str_mv |
dexamethasone raw natural waters direct analysis square-wave adsorptive voltammetry |
topic |
dexamethasone raw natural waters direct analysis square-wave adsorptive voltammetry |
description |
This paper describes an electroanalytical methodology using square-wave adsorptive voltammetry, which has been successfully applied for the direct determination of dexamethasone residues in raw natural waters used for the public supply of the Ceará State, Brazil. The obtained detection limits ranged from 7.47 × 10-9 to 1.80 × 10-8 mol L-1 for the three matrices of raw natural waters evaluated. High percentages of average recovery (98.86% ± 0.72), repeatability (0.32% ± 0.05) and reproducibility (0.91% ± 0.20) were obtained in these samples, reaffirming the sensitivity of the procedure. Energy of the LUMO orbitals and Müllikens atomic charges were calculated using the functional BLYP/DNP. The theoretical results allied to the diagnostic criteria of the square-wave voltammetry indicate that the dexamethasone redox mechanism is associated to the quasi-reversible and irreversible reduction process of the ketone groups located at C-20 and C-3, respectively. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-01-01 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000100016 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0103-50532012000100016 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S0103-50532012000100016 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
text/html |
dc.publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
publisher.none.fl_str_mv |
Sociedade Brasileira de Química |
dc.source.none.fl_str_mv |
Journal of the Brazilian Chemical Society v.23 n.1 2012 reponame:Journal of the Brazilian Chemical Society (Online) instname:Sociedade Brasileira de Química (SBQ) instacron:SBQ |
instname_str |
Sociedade Brasileira de Química (SBQ) |
instacron_str |
SBQ |
institution |
SBQ |
reponame_str |
Journal of the Brazilian Chemical Society (Online) |
collection |
Journal of the Brazilian Chemical Society (Online) |
repository.name.fl_str_mv |
Journal of the Brazilian Chemical Society (Online) - Sociedade Brasileira de Química (SBQ) |
repository.mail.fl_str_mv |
||office@jbcs.sbq.org.br |
_version_ |
1750318173062692864 |