VISOCOLOR® ECO Zinc • Colorimetric determination of zinc • At a pH of 8.5 – 9.5 zinc ions react with zincon to form a blue colour complex. • Acidic, alkaline and buffered samples have to be adjusted to pH 9 for the test. Type: colorimetric test kit Range: 0 · 0.5 · 1 · 2 · 3 mg/L Zn2+ Sufficient for: 120 determinations Shelf life at least: 1 year Sea water suitability: yes, after dilution 1+9 Detectable with PF-12: yes • Zinc is one of the most often used metals for surface finishing. • Its content in waste water from e. g. electroplating companies has to be monitored regularly.