VISOCOLOR® ECO Calcium • Titration test kit for determination of calcium • Complexometric titration after precipitation of the magnesium salts. (Reaction basis according to DIN 38406-3 E3) Type: titration test kit Range: 1 drop = 5 mg/l Ca2+ Sufficient for: 100 tests at an average calcium content of 50 mg/l Ca2+ Shelf life at least: 1.5 years Sea water suitability: yes, after dilution 1+4 Detectable with PF-12: no • Calcium is widely distributed in nature, rocks and water. • Water containing calcium and magnesium causes problems in industry as well as in households, since during boiling calcium carbonate is precipitated as detrimental boiler scale and since calcium ions inhibit the foaming of soaps.