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Tartaric Acid Equivalents

• Titratable acidity of a solution, is a measure of all the various acids present in solution.
  
  
• The calculations performed to determine the grape juice or wine's acidity, following the titration procedure, assumes, for convenience, that all acids exist as tartaric acid.
  
  Tartaric acid is chosen to represent the other acids present, as this is usually the main acid in grape juice and wine.
  
  
• The units of titratable acidity then is given in g/L as tartaric acid or tartaric acid equivalents.
  
  
• In countries such as France, acidity concentrations are give as g/L of sulphuric acid (H₂SO₄) equivalents. A much smaller figure.