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Please use this identifier to cite or link to this item: http://repositorio.ufba.br/ri/handle/ri/13038

Title: A liquid chromatographic method optimization for the assessment of low and high molar mass carbonyl compounds in wines
Other Titles: Journal of Separation Science
Authors: Azevedo, Luciana Cavalcante de
Reis, Marina M.
Pereira, Giuliano E.
Rocha, Gisele Olímpio da
Silva, Luciana A.
Andrade, Jailson Bittencourt de
Keywords: Carbonyl compounds;Liquid chromatography;Method development and optimization;São Francisco valley;Speciation;Wines
Issue Date: 2009
Abstract: Carbonyl compounds (CC) play an important role in beverage aroma since they may affect flavor of wines, brandies, and beers, among others. For this reason, it is necessary to identify and quantify CC through adequate analytical techniques. This study is a proposal of both developing and optimization of a new analytical methodology that allows investigate C1–C8 CC in wines simultaneously by quantifying even those ones that are predominantly present in the adduct form hydroxylalkylsulfonic acids (HASA). The HASA dissociation is undertaken by specific alkaline media (pH 11). The developed methodology employed the LC with UV/VIS detection (λ = 365 nm) technique under gradient elution in the way to reach both free-CC and bound-CC quantification. Results showed that binary gradient system using eluent A (MeOH/ACN/H2O 74.5:0.5:25% v/v/v) and eluent B (MeOH) reached the best separation condition of both lower and higher molecular mass CC. This proposed method allowed simultaneous quantification of formaldehyde, acetaldehyde, propanone, furfuraldehyde, butyraldehyde, benzaldehyde, hexanaldehyde, 2-ethyl-hexanaldehyde, E-pent-2-en-1-al, and cyclohexanone – all of them were found in white wine (Moscato Canelli) and red wine (Shiraz) produced in the São Francisco Valley, in the Northeastern Region of Brazil – although this optimized method may probably be suitable for quantification of propionaldehyde, isobutyraldehyde, heptanaldehyde, octanaldehyde, benzaldehyde, and E-hex-2-en-1-al as well. We could not prove if this method is also able to determine the latter CC group since we have not found these substances present in detectable levels in our real samples considered in this study.
Description: Texto completo: acesso restrito. p. 3432-3440
URI: http://www.repositorio.ufba.br/ri/handle/ri/13038
ISSN: 1615-9306
Appears in Collections:Artigos Publicados em Periódicos (Quimica)

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