Methods
The alkalinity of water is a measurement of its buffering capacity. Alkalinity of natural waters is typically a combination of bicarbonate, carbonate, and hydroxide ions. Sewage and wastewaters usually exhibit higher alkalinities due to the presence of silicates and phosphates.
Alkalinity inhibits corrosion in boiler and cooling waters. It is also measured as a means of controlling water and wastewater treatment processes or the quality of various process waters.
Alkalinity (total)
ASTM D 1067-06, Acidity or Alkalinity of Water, Test method B. APHA Standard Methods, 23rd ed., Method 2320 B-1997. USEPA Methods for Chemical Analysis of Water and Wastes, Method 310.1 (1983).