Utilize este identificador para referenciar este registo: http://hdl.handle.net/10198/4372
Título: Headspace solid phase microextraction (spme) analysis of flavor compounds in wines. Effect of the matrix volatile composition in the relative response factors in a wine model
Autor: Rocha, Sílvia
Martins, Vitor Manuel Ramalheira
Barros, António
Delgadillo, Ivonne
Coimbra, Manuel A.
Palavras-chave: SPME
Flavor compounds
Data: 2001
Editora: American Chemical Society
Citação: Rocha, Sílvia; Ramalheira, Vitor; Barros, António; Delgadillo, Ivonne; Coimbra, Manuel A. (2001) - Headspace solid phase microextraction (spme) analysis of flavor compounds in wines. Effect of the matrix volatile composition in the relative response factors in a wine model. Journal of Agricultural and Food Chemistry. ISSN 0021-8561. 49:11, p. 5142-5151
Resumo: The application of headspace solid phase microextraction (SPME) for flavor analysis has been studied. Headspace SPME sampling was tested for nine common wine flavor compounds in 10% (v/v) aqueous ethanol: linalool, nerol, geraniol, 3-methyl-1-butanol, hexanol, 2-phenylethanol, ethyl hexanoate, ethyl octanoate, and ethyl decanoate. The chemical groups (monoterpenoids, aliphatic and aromatic alcohols, and esters) showed specific behavior in SPME analysis. SPME sampling parameters were optimized for these components. Relative response factors (RRFs), which establish the relationship between the concentration of the compound in the matrix liquid solution and the GC peak area, were estimated for all compounds. Log10(RRF) varied from 0 (3-methyl-1-butanol) to 3 (ethyl decanoate), according to their molecular weight. Quantification by SPME was shown to be highly dependent on the matrix composition; the compounds with higher RRF were the less affected. As a consequence, the data obtained with this methodology should be used taking into consideration these limitations, as shown in the analysis of four monovarietal Bairrada white wines (Arinto, Bical, Cerceal, and Maria Gomes).
Peer review: yes
URI: http://hdl.handle.net/10198/4372
ISSN: 0021-8561
Aparece nas colecções:PTV - Artigos em Revistas Indexados ao ISI/Scopus

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