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.
