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https://repositorio.ufba.br/handle/ri/14336
metadata.dc.type: | Artigo de Periódico |
Título : | Evaluation of the formation and stability of hydroxyalkylsulfonic acids in wines |
Otros títulos : | Journal of Agricultural and Food Chemistry |
Autor : | Azevedo, Luciana Cavalcante de Reis, Marina M. Motta, Luiz F. Rocha, Gisele Olímpio da Silva, Luciana A. Andrade, Jailson Bittencourt de |
metadata.dc.creator: | Azevedo, Luciana Cavalcante de Reis, Marina M. Motta, Luiz F. Rocha, Gisele Olímpio da Silva, Luciana A. Andrade, Jailson Bittencourt de |
Resumen : | The presence of carbonyl compounds (CCs) in wines has sparked the interest of researchers in several countries. The quantification of some of these compounds has been used as a parameter of quality for many fermented beverages. Although present in minute quantities (except for acetaldehyde), they have a strong olfactory impact. In addition, the CCs found in wines have a strong affinity for bisulfite and can form stable adducts, which will also interfere in the characteristics of aroma. The greatest challenge, however, is to predict which CCs have the strongest affinity for S(IV) and what conditions favor this interaction. To better understand the reaction of CC–bisulfite adduct formation (HASA), this study has evaluated the profile of 22 CCs in a “synthetic wine” containing bisulfite and in 10 real samples of different wines from the São Francisco Valley, northeastern Brazil. On the basis of principal component analysis (PCA) and dissociation constants, the results revealed that aliphatic aldehydes form adducts with S(IV), whereas ketones, cyclic aldehydes, and trans-alkenes interact weakly and are found predominantly in their free form. These results revealed also that pH 10 and 11 were defined as the most appropriate for CC–SO2 adduct dissociation, and the total CCs were quantified reliably. |
Palabras clave : | Hydroxyalkylsulfonic acids Carbonyl compounds Bisulfite Wine São Francisco Valley |
metadata.dc.rights: | Acesso Aberto |
URI : | http://repositorio.ufba.br/ri/handle/ri/14336 |
Fecha de publicación : | 2007 |
Aparece en las colecciones: | Artigo Publicado em Periódico (Química) |
Ficheros en este ítem:
Fichero | Descripción | Tamaño | Formato | |
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jf0709653.pdf | 1,24 MB | Adobe PDF | Visualizar/Abrir |
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