Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear

Detalhes bibliográficos
Autor(a) principal: Tavares,Leila Aley
Data de Publicação: 2006
Outros Autores: Ferreira,Antonio Gilberto
Tipo de documento: Artigo
Idioma: por
Título da fonte: Química Nova (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005
Resumo: Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.
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spelling Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclearcaffeinequantitative ¹H NMRcoffee compositionCoffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.Sociedade Brasileira de Química2006-10-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005Química Nova v.29 n.5 2006reponame:Química Nova (Online)instname:Sociedade Brasileira de Química (SBQ)instacron:SBQ10.1590/S0100-40422006000500005info:eu-repo/semantics/openAccessTavares,Leila AleyFerreira,Antonio Gilbertopor2011-09-06T00:00:00Zoai:scielo:S0100-40422006000500005Revistahttps://www.scielo.br/j/qn/ONGhttps://old.scielo.br/oai/scielo-oai.phpquimicanova@sbq.org.br1678-70640100-4042opendoar:2011-09-06T00:00Química Nova (Online) - Sociedade Brasileira de Química (SBQ)false
dc.title.none.fl_str_mv Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
title Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
spellingShingle Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
Tavares,Leila Aley
caffeine
quantitative ¹H NMR
coffee composition
title_short Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
title_full Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
title_fullStr Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
title_full_unstemmed Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
title_sort Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear
author Tavares,Leila Aley
author_facet Tavares,Leila Aley
Ferreira,Antonio Gilberto
author_role author
author2 Ferreira,Antonio Gilberto
author2_role author
dc.contributor.author.fl_str_mv Tavares,Leila Aley
Ferreira,Antonio Gilberto
dc.subject.por.fl_str_mv caffeine
quantitative ¹H NMR
coffee composition
topic caffeine
quantitative ¹H NMR
coffee composition
description Coffee is one of the beverages most widely consumed in the world and the "cafezinho" is normally prepared from a blend of roasted powder of two species, Coffea arabica and Coffea canephora. Each one exhibits differences in their taste and in the chemical composition, especially in the caffeine percentage. There are several procedures proposed in the literature for caffeine determination in different samples like soft drinks, coffee, medicines, etc but most of them need a sample workup which involves at least one step of purification. This work describes the quantitative analysis of caffeine using ¹H NMR and the identification of the major components in commercial coffee samples using 1D and 2D NMR techniques without any sample pre-treatment.
publishDate 2006
dc.date.none.fl_str_mv 2006-10-01
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=S0100-40422006000500005
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0100-40422006000500005
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv 10.1590/S0100-40422006000500005
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 Química Nova v.29 n.5 2006
reponame:Química Nova (Online)
instname:Sociedade Brasileira de Química (SBQ)
instacron:SBQ
instname_str Sociedade Brasileira de Química (SBQ)
instacron_str SBQ
institution SBQ
reponame_str Química Nova (Online)
collection Química Nova (Online)
repository.name.fl_str_mv Química Nova (Online) - Sociedade Brasileira de Química (SBQ)
repository.mail.fl_str_mv quimicanova@sbq.org.br
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