ASBC Methods of Analysis - Beer-8: Total Acidity
ASBC Methods of Analysis
Total acidity (TA) is defined as the number of acidic protons that the organic acid potentially can donate. It is experimentally determined by measuring the amount of sodium hydroxide required to raise the pH to 8.2, where neutralization of the acids occurs. Note, however, that using this method will not dissociate all of the protons and thus the method is more accurately defined as titratable acidity, which is the measurement of hydrogen ions consumed by titration with a standard base to an end point. Although technically different, titratable acidity is often used as an approximation of total acidity, and thus is generally referred to as TA.