Content of mineral ions in wines from Canary Islands (Spain)

This study determines the content of Na, K, Ca, Mg, Fe, Cu, Zn, Mn, Sr, Li and Rb in wines from the islands of La Gomera and Fuerteventura in the Canarian archipelago (Spain). Analyses were performed by atomic spectroscopy techniques. Na, K, Ca and Mg were determined in dilute samples and the remainder of metals in samples previously treated with nitric acid in a microwave oven. 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 type of wines, between both islands, and with the remaining islands of the Canarian archipelago. Principal component analysis shows that Fuerteventura wines can be differentiated from all other wines of the Canarian archipelago.