Which tartrate stability method involves adding potassium bitartrate and cooling to 0C?

Which tartrate stability method involves adding potassium bitartrate and cooling to 0C?

• A. Cold Stabilization
• B. Contact Process
• C. Metatartaric Acid
• D. Carboxymethylcellulose

Answer: (B)

Tartrate stability methods differ between forcing crystals to form and preventing crystal formation. The approach that adds potassium bitartrate as seeds and then cools the wine to near 0°C uses seeding to trigger tartrate crystallization and rapid precipitation, which is the contact process. Seed crystals provide nucleation points, and the extreme chill drives the crystals to form quickly and settle out, stabilizing the wine. Cold stabilization achieves precipitation by cooling but without adding seed crystals, while metatartaric acid and carboxymethylcellulose work by chemical or physical stabilization to prevent crystal growth rather than initiating it.

Tartrate stability methods differ between forcing crystals to form and preventing crystal formation. The approach that adds potassium bitartrate as seeds and then cools the wine to near 0°C uses seeding to trigger tartrate crystallization and rapid precipitation, which is the contact process. Seed crystals provide nucleation points, and the extreme chill drives the crystals to form quickly and settle out, stabilizing the wine. Cold stabilization achieves precipitation by cooling but without adding seed crystals, while metatartaric acid and carboxymethylcellulose work by chemical or physical stabilization to prevent crystal growth rather than initiating it.