VISOCOLOR® ECO Carbonate hardness
Titrimetric determination of carbonate hardness
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 | |
| Cat. No. | 931 014 |
| 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 2 years |
| Sea water suitability | yes |
| Detectable with PF-11 | no |
Carbonate hardness is that portion of calcium and magnesium ions which are present as carbonate or hydrogen carbonate.
