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 ?
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.
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.
Principle: The difference between total hardness and calcium hardness multiplied by the appropriate factor gives Magnesium.
1) Natural surface water sources typically containing concentration of up to 10mg/l, such sources rarely contain more than 100 mg of magnesium per liter, and it is usually calcium hardness that predominant.
On the calcium hardness scale, the water treatment plant near Waldenburg registered 415.
WaterPOINT 870 is the first fully integrated field handheld system that provides an entire panel of key water quality tests, including measurements for pH, ORP, conductivity, free chlorine, total chlorine, monochloramine, ammonia, total dissolved solids, carbonate alkalinity, calcium hardness, Langelier saturation index, calcium, carbon dioxide, and temperature.
WaterPOINT 870 is the first fully integrated field hand-held system that provides an entire panel of key water quality tests including measurements for pH, ORP, Conductivity, Free Chlorine, Total Chlorine, Monochloramine, Ammonia, Total Dissolved Solids, Carbonate Alkalinity, Calcium Hardness, Langelier Saturation Index, Calcium, Carbon Dioxide and Temperature.