Differential Absortion of Metals from Soil to Diverse Vine Varieties; Consequences to Evaluate Wine Provenance.

FABANI, M.P.; TORO, M.E.; VAZQUEZ, F.; DÍAZ, M. P.; WUNDERLIN, D.A.

JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY

American Chemical Society

Año: 2009 vol. 57 p. 7409 - 7416

0021-8561

We report the effect of vine variety on the absorption of metals from soil and its follow to wine through juice, verifying which metals could be used to assess wine provenance. Eleven metals were determined by atomic absorption spectroscopy in 32 soils, 16 grapes juices and 18 wines sampled from a single vineyard having four red grape varieties (Cabernet Sauvignon, Bonarda, Malbec and Syrah). K nearest neighbor method (KNN) allows distinguishing among different soils, juices and wines. Linear Discriminant Analysis (LDA) affords descriptors to point out differences: mainly Mg, Mn, Ca, K and Na. Data analysis evidenced that some elements have equivalent concentrations in soil, juice and wine, while others did not. Canonical analysis shows good correlation between grape juice and wine with their provenance soil. We suggest using Mg as marker of wine provenance, while Mn could be used to evaluate differences between wine varieties associated with plant physiology.