In extraction chemistry during red winemaking, which statement is correct about solvents for tannin and anthocyanin extraction?

• A. Tannins in alcohol; Anthocyanins in aqueous solution
• B. Tannins in water; Anthocyanins in acetone
• C. Tannins in oil; Anthocyanins in ethanol
• D. Tannins in air; Anthocyanins in nitrogen

Answer: (A)

In red winemaking, the solvent that extracts a compound is driven by polarity and the evolving solvent milieu as fermentation proceeds. Tannins are large, relatively less polar polyphenols that dissolve more readily in alcohol than in water. As fermentation progresses and ethanol levels rise, tannins dissolve into the alcohol-rich medium, making alcohol the favorable solvent for tannin extraction. Anthocyanins, on the other hand, are water-soluble pigments; they are readily extracted into the aqueous portion of the must, especially early in maceration when water is abundant and ethanol is low. So, the pairing that tannins favor alcohol as a solvent while anthocyanins favor an aqueous environment aligns with their chemical nature and with how extraction unfolds during red winemaking. Solvents like acetone, oil, air, or nitrogen aren’t representative extraction media used in this process.