We collected berry samples on Tuesday, September 15. Here are the results (Brix or sugar, pH and TA or acid). Cultivar °Brix pH TA Chambourcin bc 22.6 3.26 0.890 Chambourcin gdc 22.2 3.28 0.960 Catawba - dm 20.2 3.14 1.005 Catawba - West 17.6 3.08 1.308 … [Read more...] about Grape juice chemistry