Adaptation of an olfactometric system in a GC-FID in combination with GCxGC/MS to evaluate odor-active compounds of wine.

Autor: Welke JE; Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil., Nicolli KP; Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil., Hernandes KC; Instituto de Ciência e Tecnologia de Alimentos, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil., Biasoto ACT; Empresa Brasileira de Pesquisa Agropecuária, Embrapa Semiárido, BR 428, km 152, CEP: 56302-970 Petrolina, PE, Brazil., Zini CA; Instituto de Química, Universidade Federal do Rio Grande do Sul, Avenida Bento Gonçalves, 9500 Porto Alegre, RS, Brazil. Electronic address: cazini@iq.ufrgs.br.
Jazyk: angličtina
Zdroj: Food chemistry [Food Chem] 2022 Feb 15; Vol. 370, pp. 131004. Date of Electronic Publication: 2021 Sep 01.
DOI: 10.1016/j.foodchem.2021.131004
Abstrakt: A step-by-step approach to easily adapt and use a GC-FID as an olfactometer, as well as a detailed description of acquisition and interpretation of olfactometric data by the OSME (from the Greek word for odor, ὀσμή) method. A Merlot wine was used to exemplifly this strategy and its volatiles were characterized, rendering 43 volatiles in 1D-GC/MS and 142 in GCxGC/MS. GC-O showed the presence of 24 odor-active compounds and GCxGC/MS indicated aditional 14 odor-active compounds, which were found as coelutions. Six compounds (isoamyl acetate, ethyl octanoate, ethyl decanoate, 3-methylthio-1-propanol, carvone, benzyl alcohol and nonanoic acid) were described in 1D-GC-O analyses as having distinct odors by the same and by different assessors. This fact indicated the presence of coeluting bands, which were resolved by GCxGC/MS. The adapted GC-O in combination with the use of GCxGC/MS may be a tool to more accurate investigation of the odor-active compounds of wine.
(Copyright © 2021 Elsevier Ltd. All rights reserved.)
Databáze: MEDLINE
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