Hardness Indicator | 20g Bottle, 0.2 g/Test in 50mL Sample
Description
This Hardness Indicator Powder (EriocHRome Powder) [PN: T-10-051] is a powder pack that is fast and easy to use, making them popular for water testing applications in many countries throughout the world. It provides users with a real alternative to existing measurement systems.
They are produced to high quality standards, and parameters from aluminum and chlorine through to sulfate are just a few of the well known tests included in this powder pack range.
Features
- PN: T-10-051
- Volume: 20g/bottle
- Parameter and Range: Hardness total P 0 – 60 mg/L CaCO3
Determination of Hardness
The hardness of water is a measure of its soap-consuming capacity; in practice, it corresponds to the calcium and magnesium ion content. The soap test originally used for its estimation has now been superseded by complexometric methods using dyes such as Eriochrome Black T., developed by Biedermann and Schwarzenbach. A modification has been made to the tritrimetric method to allow a gradual color change with increasing hardness, so permitting the use of a simple colorimetric procedure.
To overcome the deterioration in storage associated with solutions of Eriochrome Black T., the indicator is incorporated in the test powder formulation, which, as an additional advantage, provides much greater convenience in practice.
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