40
METHOD PROCEDURE
• Insert the cuvette into the holder and ensure that
the notch on the cap is positioned securely in the
groove.
• Press
Read
. The display will show a 30 second countdown prior to the measurement.
To skip the timer, press
Read
twice. When the timer ends, the meter will perform the
reading. The instrument displays concentration in
mg/L
of
iron (Fe).
INTERFERENCES
Interference may be caused by:
• Manganese above 50.0 mg/L
• Cadmium, Molybdenum above 4.0 mg/L
• Cyanide above 2.8 mg/L
• Chromium(VI) above 1.2 mg/L
• Nickel above 1.0 mg/L
• Nitrite ion above 0.8 mg/L
• Copper above 0.6 mg/L
• Mercury above 0.4 mg/L
• Chromium(III) above 0.25 mg/L
• Cobalt above 0.05 mg/L
• Sample pH should be between 3 and 4 to avoid fading or turbidity formation