NANOCOLOR® Residual Hardness 1
Photometric determination of hardness
Calcium and magnesium ions react in alkaline solution with phthalein purple to form a violet dye.
Data and ordering information
Cat. No. 985 084
Type tube test 0-84
Range 0.02 – 1.00 °d
0.004 – 0.180 mmol/l
Sufficient for 20 determinations
Shelf life at least 1 year
Sea water suitability no
