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1,3‐Dimethoxybenzene, a newly identified component of port wine
Author(s) -
Rogerson Frank S S,
Azevedo Zelia,
Fortunato Nélia,
de Freitas Victor A P
Publication year - 2002
Publication title -
journal of the science of food and agriculture
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.782
H-Index - 142
eISSN - 1097-0010
pISSN - 0022-5142
DOI - 10.1002/jsfa.1182
Subject(s) - vintage , wine , chemistry , port wine , food science , chromatography , component (thermodynamics) , biochemistry , medicine , physics , surgery , thermodynamics
1,3‐Dimethoxybenzene was identified by GC–O, GC–MS and Kovats indices (polar Supelcowax, 1709; non‐polar Rtx‐5MS, 1158) as a new volatile component of port wine. Sensory evaluation described this compound as having a sweet medicinal odour with hazelnut, resinous and woody notes. Respective threshold limits in model wine and port wine were 21 and 47 µg l −1 . Quantitative analysis by GC–MS, using a selected characteristic ion ( m/z 138), indicated that young port wines from the 1998 vintage contained up to 3 µg l −1 whereas ports from the 1999 vintage contained up to 20 µg l −1 . © 2002 Society of Chemical Industry