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| VISOCOLOR® ECO Iron |
| Colorimetric determination of iron |
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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 |
| REF |
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 · 1.0 mg/l Fe |
| Sufficient for |
100 determinations |
| Shelf life |
at least 2 years |
| Sea water suitability |
yes |
| Detectable with PF-12 |
yes |
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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. |
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