Description
Boutron-Boudet's reagent for determin., of water hardness acc. to Boutron and Boudet, Density (D) 0,9 g/cm³, Flash point (flp) 12 °C, Boiling point (bp) >78 °C, UN-Nr. 1987
The water hardness according to Boutron-Boudet is determined with various water samples of known and unknown hardness. It is a comparison of the amount of foam on different samples. HINT: A few drops of the solution are added to 40 ml distilled water and shaken. The samples with known and unknown water hardness are also mixed with the solution drop by drop and shaken until there is the same amount of foam with the same stability as in the distilled water sample. The water hardness can be calculated from this.
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A reagent for analysis is a chemical whose impurities are limited so they do not become a signal in a titration, a digestion or a photometric method. Pharmacopoeia, ASTM and DIN names point at different limit lists. The grade, not only the identity, is the purchase.
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