[Differentiation of natural red wines from white wines blended with oenocyanine (author's transl)].
A method is proposed for the differentiation of natural red wines from those obtained by addition of oenocyanine to white wines. The procedure is based on the determination of tannin phenolics and nontannin phenolics by selective precipitation with methyl cellulose and subsequent estimation of the intensity of absorption at 450 nm and 520 nm. The sum of ratio: mg/1 non tannin phenolics/absorption at 450 nm X 1000 and mg/1 tannin phenolics/absorption at 520 nm X 1000, furnishes values which are in correlation with the origin of two wines and such as to consent their differentiation.
D003485:Cyanates / Q000494:pharmacology; D005505:Food Coloring Agents; D010636:Phenols / Q000032:analysis; D014920:Wine / Q000032:analysis
D003485:Cyanates; D005505:Food Coloring Agents; D010636:Phenols
Differenziazione dei vini rossi naturali da quelli ottenuti per addizione di enocianina ai vini bianchi