VISOCOLOR® ECO Iron
Colorimetric determination of iron
Triazine method: iron(II) ions react with a triazine derivative to form a violet complex. Iron(III) ions are reduced and thus also determined.
|Data and ordering information|
|Cat. No.||931 026 (931 226)|
|Type||colorimetric test kit (refill pack)|
|Range||0 0.04 0.07 0.10 0.15 0.20 0.30 0.50 1. mg/l Fe|
|Sufficient for||100 determinations|
|Shelf life||at least 2 years|
|Sea water suitability||yes|
|Detectable with PF-11||yes|
Natural waters as well as waste waters often contain some iron. It can be present as Fe(II) or Fe(III) ions if the pH value of the water is below 3 or if the water is free of oxygen. At higher pH values Fe(III) forms an insoluble oxyhydrate. Frequently the sample is in a transition state with finely dispersed iron oxides. In waste water and natural water containing humic acids iron is often present in the form of a complex salt.
The VISOCOLOR® test kits only determine iron which is present in dissolved form as Fe2+or Fe3+ ions. Iron complexes are not covered unless they are decomposed by oxidation with nitric acid and sulphuric acid.