calcium hardness

calcium hardness

[′kal·sē·əm ‚härd·nəs]
(chemistry)
Presence of calcium ions in water, from dissolved carbonates and bicarbonates; treated in boiler water by introducing sodium phosphate.
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References in periodicals archive ?
Surface active agents - Preparation of water with known calcium hardness.
The pH, conductivity, and concentrations of total alkalinity, total hardness, and calcium hardness in Alabama streams tended to be lowest in the Piedmont Plateau (PP) and Coastal Plain (CP), intermediate in the Ridge and Valley (RV), Appalachian Plateau (AP), and Highland Rim fHRV and highest in the Blackland Prairie (BP).
Total alkalinity and calcium hardness were analyzed with the help of lovibond Minikit (AF 444).
chlorine, oxygen in flue gas, carbon dioxide in flue gas, oxygen in hydrogen gas, total hardness, calcium hardness, p-alkalinity, m-alkalinity, chlorides, sulphates, turbidity, etc.
The parameters studied were pH electrical conductivity alkalinity total hardness calcium hardness magnesium hardness total solids total dissolved solids total suspended solids sodium chlorides nitrites sulphate and potassium.
Working with fish biologist Les Torrans, Chatakondi incubated fertilized hybrid eggs in waters containing four levels of calcium hardness to determine which level yields the highest hatching success.
Two other measurements that are very important when discussing heater longevity are Total Alkalinity (or TA) and Calcium Hardness.
The physical and chemical parameters tested were odor, color, turbidity, magnesium hardness, calcium hardness, phenolphthalein alkalinity, chloride, dissolved oxygen, silica, ammonia, carbon dioxide, nitrate, phosphate, zinc, iron and chromate.
The increased cycles of concentration were verified by total dissolved solids, conductivity, and chloride measurements, although calcium hardness and alkalinity of the make-up water decreased during this device trial in comparison to PEFD trial 1/2.