| VISOCOLOR® ECO Carbonate hardness |
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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)
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| Data and ordering information |
| Cat. No. |
931 014 |
| Type |
titration test |
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Range
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1 drop = 1 °d (corresp. to 18 mg/l CaCO3)
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| Sufficient for |
about 100 tests with an average hardness of 10 °d |
| Shelf life |
at least 2 years |
| Sea water suitability |
yes
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| Detectable with PF-11 |
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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