White: Hyper Oxidation

Question 1

Define hyper-oxidation

Answer 1

A technique of deliberately exposing the must to large quantities of oxygen before fermentation.

Question 2

What does hyper oxidation do to the must, and why is it performed on some wines?

Answer 2

• it will oxidize compounds that oxidize easily, which turn brown as they do so
• stabilizes the wine against oxidation, after fermentation
• removes bitter compounds that come from unripe skins, stems, and seeds

Question 3

Why would hyperoxidation not be used?

Answer 3

Hyper oxidation can destroy some volatile aroma compunds, and so is not suitable for aromatic varieties

Question 4

What are the cost impacts of hyper-oxidation?

Answer 4

• takes time and some equipment to perform, and so has a small impact on costs