microtest® Test Kit Specifications

microtest Iron FZ (HS)

Colorimetric Test for


0.025 – 0.4 mg/L Fe2+/Fe3+

Product Code656100
ContentsReagent A, 15 mL
Reagent B, 15 mL
Test tube, 5 mL (2x)
Colour chart
Analytical MethodPDTS (Ferrozine): In the pH range 3.5 – 4.5 ferrous iron (Fe2+) forms a violet complex with Ferrozine (PDTS). The intensity of its colour is related to the iron concentration. Ferric iron (Fe3+) is reduced to Fe2+ prior to the measurement.
Number of Tests70
InterferencesThe test is suitable for freshwater and seawater. Interferences are caused by cyanide, nitrite, (>10 mg/L), cobalt, copper(I) (>5 mg/L). Only dissolved iron will be determined.
Measuring RangeThe standard measuring range is 0.025 – 0.4 mg/L. The colour comparator has 5 colour fields: 0.025–0.05–0.1–0.2–0.4 mg/L. For higher iron concentrations, the sample has to be diluted. A 1:5 sample dilution can be carried out easily, thus extending the measuring range to 2 mg/L.
Shelf Life2 years
ApplicationsDetermination of iron in ground waters (bore water); monitoring of steel corrosion in industrial water treatment.monitoring of steel corrosion in industrial water treatment.