FermCalc includes four calculators related to acidity determination and adjustment:
- Acid Titration – The Acid Titration Calculator determines the titratable acidity (TA) of a wine sample given the volume of the sample and the volume of sodium hydroxide (NaOH) added during a titration test.
- Acidification & Deacidification – Amelioration is the dilution of must with water in order to reduce the acidity or sugar content. The Acidification & Deacidification Calculator determines the amount of a selected acid or deacidifier required to increase or decrease the acidity of a wine from its current value to some target value. If the target acidity is greater than the initial acidity, a list of acids will be shown. If the target acidity is less than the initial acidity, a list of deacidifiers will be shown.
- Amelioration – The Amelioration Calculator determines the required additions of water, sugar, and acid to a must to meet the desired acidity and SG levels given the initial acidity, initial SG, and initial must volume. Alternatively, the target must volume can be specified, in which case FermCalc calculates the initial volume of must required, along with the required water, acid, and sugar additions.
- NaOH Standardization – Standardization is the process of testing a solution of unknown concentration with a solution of a known, precise concentration. The NaOH Standardization Calculator determines the normality of your sodium hydroxide (NaOH) solution from the titration of a potassium hydrogen phthalate (KHP) solution of known normality.
Calculation details for each of the calculators are described on the individual calculator pages linked above.