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 … [Read more...] about Grape juice chemistry