GC-MS IDENTIFICATION OF VOLATILE COMPONENTS OF GALICIAN (NORTHWESTERNSPAIN) WHITE WINES - APPLICATION TO DIFFERENTIATE RIAS-BAIXAS WINES FROM WINES PRODUCED IN NEARBY GEOGRAPHICAL REGIONS
Cm. Garciajares et al., GC-MS IDENTIFICATION OF VOLATILE COMPONENTS OF GALICIAN (NORTHWESTERNSPAIN) WHITE WINES - APPLICATION TO DIFFERENTIATE RIAS-BAIXAS WINES FROM WINES PRODUCED IN NEARBY GEOGRAPHICAL REGIONS, Journal of the Science of Food and Agriculture, 69(2), 1995, pp. 175-184
A capillary gas chromatography-ion trap mass spectrometry linked techn
ique improved with a programmable temperature injector was applied to
identify some volatile components (more than 100 compounds) in certifi
ed brand of origin (CBO) Rias Baixas white wines. Some of them have no
t been previously reported in young white wines. Forty of these compon
ents were determined by capillary gas chromatogtaphy with flame ionisa
tion detection in Rias Baixas wines and in other Galician white wines.
By means of multivariate techniques of data exploration as hierarchic
al cluster analysis and principal components analysis two main groups
of samples (Rias Baixas and non-Rias Baixas wines) were observed. Howe
ver, some outliers were also pointed out among the two groups of wines
. One sample elaborated with Albarino grapes out of the delimited Rias
Baixas area showed the most anomalous behaviour. Two samples CBO Rias
Baixas seemed to be produced by mixture of grape varieties not allowe
d by the CBO regulations. Exploratory analysis results were confirmed
using supervised techniques of data classification as K-nearest neighb
ours and soft independent modelling of class analogies.