Informations
Code:
13000002
Weight:
0.25 Kg
Description
Total hardness kit (1°F)
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Full description
TOTAL HARDNESS Direction for use
1. Rinse the measuring vessel with the water to be tested and fill up the 5ml. mark.
2. Add 1-2 drops of indicator and swirl. In presence of hardness higher than 3 ppm CaCO3 a wine red colour will appear (A blue color indicates absence of hardness. With hardness lower than 3 ppm the colour of the sample shifts from violet. to grey to pink).
3.Add titrant drop by drop, mixing after each addition. Count the drops until the colour changes from red to blue. Each drop correspondes to 1°fr degree (1°fr= 10 ppm CaCO3).
4.For softened water, fill the vessel to the 10ml. mark and add 2-4 drops of indicator. Each drop of titrant corresponds to 0,5°fr degrees.