dc.contributor.author |
Tavares, Leila Aley |
|
dc.contributor.author |
Ferreira, Antonio Gilberto |
|
dc.date.accessioned |
2022-04-07T10:40:54Z |
|
dc.date.available |
2022-04-07T10:40:54Z |
|
dc.date.issued |
2006 |
|
dc.identifier.citation |
TAVARES, L. A.; FERREIRA, A. G. Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear. Química Nova, São Paulo, v. 29, n. 5, p. 911-915, set./out. 2006. |
pt_BR |
dc.identifier.issn |
1678-7064 |
|
dc.identifier.uri |
https://doi.org/10.1590/S0100-40422006000500005 |
pt_BR |
dc.identifier.uri |
http://www.sbicafe.ufv.br/handle/123456789/13435 |
|
dc.description.abstract |
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. |
pt_BR |
dc.format |
pdf |
pt_BR |
dc.language.iso |
pt_BR |
pt_BR |
dc.publisher |
Sociedade Brasileira de Química |
pt_BR |
dc.relation.ispartofseries |
Química Nova;v.29, n.5, 2006 |
|
dc.rights |
Open Access |
pt_BR |
dc.subject |
Caffeine |
pt_BR |
dc.subject |
Quantitative ¹H NMR |
pt_BR |
dc.subject |
Coffee composition |
pt_BR |
dc.subject.classification |
Cafeicultura::Qualidade de bebida |
pt_BR |
dc.title |
Análises quali- e quantitativa de cafés comerciais via ressonância magnética nuclear |
pt_BR |
dc.type |
Artigo |
pt_BR |