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Content in metallic ions of wines from the Madeira and Azores archipelagos

Pérez Trujillo, Juan P., Conde, José E., Pérez Pont, María L., Câmara, J., Marques, José C.
Food chemistry 2011 v.124 no.2 pp. 533-537
discriminant analysis, equipment, ions, islands, principal component analysis, sodium, table wines, Azores, Portugal
This study determines for the first time Na, K, Ca, Mg, Fe, Cu, Zn, Mn, Sr, Li and Rb contents in wines from the archipelagos of Madeira and Azores (Portugal). The greater part of the mean content for the different parameters fell within the ranges described in the literature, except for sodium whose higher content may be due to the effect of marine spray. ANOVA was used to establish the metals with significant differences in mean content between the wines from both archipelagos, between table and liquor wines of Madeira, and between wines of Pico and Terceira Islands from the Azores archipelago. Principal component analysis shows differences in the wines according to the wine-making process and/or the equipment employed. Stepwise linear discriminant analysis achieves a good classification and validation of wines according to the archipelago of origin, and the island in the case of Azores wines.