https://doi.org/10.1351/goldbook.09034
Measure of the capacity of aqueous media to react with hydrogen ions.
Notes:
- Alkalinity is used to assess the buffering capacity of natural waters and is measured by titration using methyl red (pH 4.5, total alkalinity) or phenolphthalein (pH 8.3, composite alkalinity).
- Alkalinity is often expressed as an equivalent mass concentration of calcium carbonate, for example "alkalinity equals