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| VISOCOLOR® alpha Carbonate hardness |
| Titrimetric determination of carbonate hardness |
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The determination is preformed as titration with hydrochloric acid against a
mixed indicator, which changes colour at pH 4.5. (Reaction principle analogous to APHA 2320,
DIN EN ISO 9963-1 C23 & -2 C24) |
| Data and ordering information |
| REF |
935 016 |
| Type |
titration test |
| Range |
1 drop = 1 °d (corresp. to 18 mg/l CaCO3) |
| Sufficient for |
about 100 tests with an average hardness
of 10 °d |
| Shelf life |
at least 1.5 years |
| Sea water suitability |
yes |
| Detectable with PF-12 |
no |
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Carbonate hardness is that portion of calcium and magnesium ions which are
present as carbonate or hydrogen carbonate. |
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