PATTERN-RECOGNITION ANALYSIS APPLIED TO CLASSIFICATION OF WINES FROM GALICIA (NORTHWESTERN SPAIN) WITH CERTIFIED BRAND OF ORIGIN

In 42 white wines from Galicia (northwestern Spain) some trace elements were determined by atomic spectroscopy. Data were processed using multivariate chemometric techniques involving cluster analysis, principal component analysis, discriminant analysis, K nearest neighbors, and soft independent modeling of class analogy to develop a typification for wine samples of Rias Baixas origin. The wines with Certified Brand of Origin Bias Baixas can be differentiated from wines of the other two Certified Brands of Origin from Galicia, Ribeiro and Valdeorras, which are possible substrates for falsification. Using lithium and rubidium as key features, a nearly correct classification was achieved. The probability of a non-Bias Baixas wine being accepted as genuine is practically nil.