VISOCOLOR® ECO Manganese • Colorimetric determination of manganese • In alkaline solution manganese ions react with formaldoxime to form an orange-red complex. (Reaction principle analogous to DIN 38406-E2) Type: colorimetric test kit Range: 0 · 0.1 · 0.2 · 0.3 · 0.5 · 0.7 · 0.9 · 1.2 · 1.5 mg/l Mn Sufficient for: 70 determinations Shelf life at least: 1.5 years Sea water suitability: yes Detectable with PF-12: yes • Natural waters contain manganese in the divalent, soluble form as well as in colloidal tri- and tetravalent states. • Valencies are interchanged by oxidation-reduction reactions taking place in the water. • The test procedure determines all oxidation states of manganese.