Titratable acid

Titratable acid is a term to describe acids such as phosphoric acid, sulfuric acid which are involved in renal physiology.

It is used to explicitly exclude ammonium (NH4+) as a source of acid, and is part of the calculation for net acid excretion.

It gets its name from the use of NaOH in acid-base titration to estimate the quantity of titratable acid.