Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.

Detalhes bibliográficos
Autor(a) principal: Gonçalves, Reinaldo Simões
Data de Publicação: 2009
Outros Autores: Battistin, Alice
Tipo de documento: Artigo
Idioma: por
Título da fonte: Pesquisa Agropecuária Gaúcha (Online)
Texto Completo: http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/200
Resumo: this paper presents potentiometry as an analytical technique for iron (ii) chelating ability of essential oils. in these experiments five essential Mentha oils were tested: Mentha spicata L., Mentha x genfilis L., Mentha crispa L., Mentha piperita l. and Mentha x piperita l. the strategy of this method consist to follow the open-circuit potential shift involving the fe2+Fe3+ equilibrium on the platinum electrode surface, after one drop of essential oil addition. the open- circuit potential shifts promptly to more positive potential values suggesting a strong chelating ability of the essential oils. this effect is predictable by nernst equation by withdrawing of the fe(ii) species from the fe2+/Fe3+ equilibrium. it was demonstrated that the chelating reaction is first order regarding to fe(ii) species. each essential oil has a different reaction velocity constant, however it was noticeable the constant value of mentha x gentiles.
id SEAPDR_743c5d93dc13358adc2d9c9e0dfb68b0
oai_identifier_str oai:ojs.revistapag.agricultura.rs.gov.br:article/200
network_acronym_str SEAPDR
network_name_str Pesquisa Agropecuária Gaúcha (Online)
repository_id_str
spelling Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils. Apresentação da potenciometria como método de determinação da capacidade coordenante de óleos essenciais com o íon ferro (ii). i - estudos com óleos essenciais de Menthaelectrochemical methodology, chelating ability, Pro-oxidant effect.metodologia eletroquímica, complexação, Prooxidante.this paper presents potentiometry as an analytical technique for iron (ii) chelating ability of essential oils. in these experiments five essential Mentha oils were tested: Mentha spicata L., Mentha x genfilis L., Mentha crispa L., Mentha piperita l. and Mentha x piperita l. the strategy of this method consist to follow the open-circuit potential shift involving the fe2+Fe3+ equilibrium on the platinum electrode surface, after one drop of essential oil addition. the open- circuit potential shifts promptly to more positive potential values suggesting a strong chelating ability of the essential oils. this effect is predictable by nernst equation by withdrawing of the fe(ii) species from the fe2+/Fe3+ equilibrium. it was demonstrated that the chelating reaction is first order regarding to fe(ii) species. each essential oil has a different reaction velocity constant, however it was noticeable the constant value of mentha x gentiles.o presente trabalho apresenta a potenciometria como técnica analítica para a avaliação da capacidade coorde- nante de óleos essenciais sobre um prooxidante: o íon ferroso. nestes experimentos foram testados os óleos essenciais de Mentha spicata L., Mentha x genfilis L., Mentha crispa L., Mentha piperita L. e Mentha x piperita l. a técnica consistiu no acompanhamento do deslocamento do potencial de circuito aberto de um eletrodo de platina, sensível ao par fe2+/Fe3+ no instante da adição do óleo essencial. o rápido aumento do potencial observado no instante da adição confirma o efei- to coordenante do óleo. este aumento é previsto pela equação de nernst em função da retirada da espécie fe (ii) do equi- líbrio Fe2+/Fe3+. a cinética do processo mostrou ser de primeira ordem em relação ao íon fe(ii). cada óleo apresentou um valor de constante de velocidade de reação, sendo o mais alto valor observado para a Mentha x genfilis. Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural2009-08-20info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/200Pesquisa Agropecuária Gaúcha; Vol 15 No 1 (2009): PESQ. AGROP. GAÚCHA; 39-43Pesquisa Agropecuária Gaúcha; v. 15 n. 1 (2009): PESQ. AGROP. GAÚCHA; 39-432595-76860104-9070reponame:Pesquisa Agropecuária Gaúcha (Online)instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulinstacron:SEAPDRporhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/200/171Gonçalves, Reinaldo Simões Battistin, Alice info:eu-repo/semantics/openAccess2024-04-22T12:40:34Zoai:ojs.revistapag.agricultura.rs.gov.br:article/200Revistahttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapagPUBhttp://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/oaipag@agricultura.rs.gov.br||2595-76860104-9070opendoar:2024-04-22T12:40:34Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sulfalse
dc.title.none.fl_str_mv Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
Apresentação da potenciometria como método de determinação da capacidade coordenante de óleos essenciais com o íon ferro (ii). i - estudos com óleos essenciais de Mentha
title Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
spellingShingle Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
Gonçalves, Reinaldo Simões
electrochemical methodology, chelating ability, Pro-oxidant effect.
metodologia eletroquímica, complexação, Prooxidante.
title_short Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
title_full Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
title_fullStr Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
title_full_unstemmed Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
title_sort Potentiometry as electrochemical method for determination of chelating ability of essential oils for reduced ion. I – studies with Mentha essential oils.
author Gonçalves, Reinaldo Simões
author_facet Gonçalves, Reinaldo Simões
Battistin, Alice
author_role author
author2 Battistin, Alice
author2_role author
dc.contributor.author.fl_str_mv Gonçalves, Reinaldo Simões
Battistin, Alice
dc.subject.por.fl_str_mv electrochemical methodology, chelating ability, Pro-oxidant effect.
metodologia eletroquímica, complexação, Prooxidante.
topic electrochemical methodology, chelating ability, Pro-oxidant effect.
metodologia eletroquímica, complexação, Prooxidante.
description this paper presents potentiometry as an analytical technique for iron (ii) chelating ability of essential oils. in these experiments five essential Mentha oils were tested: Mentha spicata L., Mentha x genfilis L., Mentha crispa L., Mentha piperita l. and Mentha x piperita l. the strategy of this method consist to follow the open-circuit potential shift involving the fe2+Fe3+ equilibrium on the platinum electrode surface, after one drop of essential oil addition. the open- circuit potential shifts promptly to more positive potential values suggesting a strong chelating ability of the essential oils. this effect is predictable by nernst equation by withdrawing of the fe(ii) species from the fe2+/Fe3+ equilibrium. it was demonstrated that the chelating reaction is first order regarding to fe(ii) species. each essential oil has a different reaction velocity constant, however it was noticeable the constant value of mentha x gentiles.
publishDate 2009
dc.date.none.fl_str_mv 2009-08-20
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/200
url http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/200
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://revistapag.agricultura.rs.gov.br/ojs/index.php/revistapag/article/view/200/171
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
publisher.none.fl_str_mv Departamento de Diagnóstico e Pesquisa Agropecuária. Secretaria de Agricultura, Pecuária e Desenvolvimento Rural
dc.source.none.fl_str_mv Pesquisa Agropecuária Gaúcha; Vol 15 No 1 (2009): PESQ. AGROP. GAÚCHA; 39-43
Pesquisa Agropecuária Gaúcha; v. 15 n. 1 (2009): PESQ. AGROP. GAÚCHA; 39-43
2595-7686
0104-9070
reponame:Pesquisa Agropecuária Gaúcha (Online)
instname:Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron:SEAPDR
instname_str Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
instacron_str SEAPDR
institution SEAPDR
reponame_str Pesquisa Agropecuária Gaúcha (Online)
collection Pesquisa Agropecuária Gaúcha (Online)
repository.name.fl_str_mv Pesquisa Agropecuária Gaúcha (Online) - Secretaria de Agricultura, Pecuária e Desenvolvimento Rural do Rio Grande do Sul
repository.mail.fl_str_mv pag@agricultura.rs.gov.br||
_version_ 1797068772102635520

Registros relacionados