MACHEREY-NAGEL VISOCOLOR ECO Test kit/ Carbonate hardness
VISOCOLOR ECO presents a product group of colorimetric and titrimetric test kits which avoids hazardous substances wherever possible. With VISOCOLOR ECO even water constituents with low limiting values can be determined with sufficient accuracy. All VISOCOLOR ECO test kits are packed in an environment-friendly box and contain easy to understand instructions in 6 languages.
Principle: Titration with drop counting
MACHEREY-NAGEL VISOCOLOR ECO Test kit Carbonate hardness
- visual evaluation
- environment-friendly, without toxic reagents
- economically priced
- convenient handling
- higher accuracy and sensitivity
- sharper color change due to separated
- dropping reagents
- reagent bottles with clear dosing instructions
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 basis according to, DIN EN ISO 9963-1 C24)
Carbonate hardness is that portion of calcium and magnesium ions which are present as carbonate or hydrogen carbonate.
Normally the carbonate hardness is smaller than the total hardness. If the carbonate hardness is larger than the total hardness, you should trace the origin of this abnormal conditions, e. g. discharge of alkali hydrogen carbonates or high buffer capacity.
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