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
Meaning of PHENOLPHTHALEIN ALKALINITY in English
Environmental engineering English vocabulary. Английский словарь экологического инжиниринга. 2012