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What's happening in the field?

At the Missouri State Fruit Experiment Station

Grape juice chemistry

September 25, 2014 by Marilyn Odneal

Here is the juice analysis results from the berries taken YESTERDAY morning, September 24.

24-Sep-14
Cultivar ˚Brix pH TA g/100ml
Catawba W 17.5 3.20 1.180
Norton F 23.3 3.31 0.840

Due to problems with the pH meter, I think the pH results may be lower than actual. The TAs were determined by visual assessment of phenolpthalien color change rather than the neutral end point using the pH meter as is usually done.

Filed Under: Grapes, Juice Analysis

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