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Volatile Acidity Equivalents

• Volatile acidity of a solution, is a measure of all the various volatile acids present in solution.
  
  
• The calculations performed to determine the grape juice or wine's volatile acidity, following the titration procedure, assumes, for convenience, that all volatile acids exist as acetic acid.
  
  
• Acetic acid is chosen to represent all of the volatile acids present, as it is the predominant volatile acid.
  
  
• The concentration of volatile acidity then is given in g/L as acetic acid or acetic acid equivalents.