Presently, the acidity of the water is given as negative alkalinity in our databases.
Acidity is measured by titration to pH 5.6 with NaOH during nitrogen gas flow-through. The endpoint is indicated with a pH electrode.
Valid since January 2008
Method: Standard Methods 16th ed. 402, pp. 265-269.
Instrument: Metrohm 855 Robotic Titrosampler with 800 Dosino.
Acidity is measured by titration to pH 5.6 with NaOH during nitrogen gas flow-through. The endpoint is indicated with a glass electrode.
1994-07 – 2007-12
Method: Standard Methods 16th ed. 402, pp. 265-269. Mettler-Toledo instrument manual.
Instrument: Mettler DL 67 Titrator. Mettler ST 20A Sample changer.
Read more about pH on Wikipedia.
Read more about buffer capacity on Wikipedia.