VISOCOLOR® ECO Aluminium • Colorimetric determination of aluminium • Colorimetric determination with chromazurol S. Type: colorimetric test kit (refill pack) Range: 0 · 0.10 · 0.15 · 0.20 · 0.25 · 0.30 · 0.40 · 0.50 mg/l Al3+ Sufficient for: 50 Shelf life at least: 2 years Sea water suitability: yes, after dilution 1+9 Detectable with PF-12: no • Aluminium is the most common metal in our anthroposphere and after oxygen and silica even the most common element of the earth’s crust. • Because of its big affinity to oxygen, aluminium does not exist in elemental form in nature, but in different oxidized compounds. • In swimming pools, aluminium salts are used as flocculant for the water treatment. • For drinking water, the WHO recommends a guide value of 0.2 mg/l Al3+. • In accordance to the EU council guideline 98/83/EEC, the threshold value for drinking water is 0.2 mg/l Al3+. • In natural water, the concentration of aluminium compounds is even low, but in waste water aluminium can appear in higher concentrations, e.g. at electroplating companies or paper mills. • Different national regulations tolerate 2 – 3 mg/l Al3+ in effluents from various industries (metal, electroplating and printing industries).