VISOCOLOR® ECO Copper • Colorimetric determination of copper • In weakly alkaline medium copper(II) ions react with cuprizone forming a blue colour complex. Type: colorimetric test kit Range: 0 · 0.1 · 0.2 · 0.3 · 0.5 · 0.7 · 1.0 · 1.5 mg/l Cu2+ Sufficient for: 100 determinations Shelf life at least: 2 years Sea water suitability: yes Detectable with PF-12: yes • In water copper(II) can be found in dissolved as well as in undissolved form. • Copper(I) compounds and undissolved copper(II) compounds are not determined unless they are decomposed with concentrated nitric acid prior to the test.