also more commonly called total alkalinity – A measure of the pH-buffering capacity of water. Also defined as the water's resistance to change in pH. Composed of the hydroxides, carbonates and bicarbonates in the water expressed in ppm or mg/L. One of the basic water tests necessary to determine water balance. The ideal range is from 60 to 140 ppm.
The quantitative capacity of a water or water solution to neutralize an acid. It is usually measured by titration with a standard acid solution of sulfuric acid, and expressed in terms of its calcium carbonate equivalent.
The capacity of a water to neutralize acids; a measure of the buffer capacity of a water. The major portion of alkalinity in natural waters is caused by (1) hydroxide, (2) carbonates, and (3) bicarbonates.