Phenolphthalein alkalinity

Phenolphthalein Alkalinity
The alkalinity in a water sample measured by the amount of standard acid needed to lower the pH to a level of 8.3 as indicated by the change of color of the phenolphthalein from pink to clear.

phenolphthalein alkalinity part of the water's total alkalinity based on the amount of standard acid used to bring a sample from a pH above 8.

See also: Alkalinity, Ph, Alkali, Water, Solution