Alkalinity Test Kit (10-200, 100-2000 mg/l as CaCO3) - No. of Tests - 300 The alkalinity of water is capacity of water to neutralise acid to desired ph. It is mainly a sum of carbonate, bicarbonate and hydroxide ions. Salts of weak acids like borate, silicate and phosphate may also contribute to alkalinity. Alkalinity is important in the treatment of potable water, waste water, boiler and cooling water. Our alkalinity kit is available in two ranges & a very easy to use test to gives reliable results.