Hanna Instruments HI 83200C - Manual (Page 37)

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Iron LR
INTERFERENCES
Interference may be caused by:
Cadmium above 4.0 mg/L
Chromium 3+ above 0.25 mg/L
Chromium 6+ above 1.2 mg/L
Cobalt above 0.05 mg/L
Copper above 0.6 mg/L
Cyanide above 2.8 mg/L
Manganese above 50.0 mg/L
Mercury above 0.4 mg/L
Molybdenum above 4.0 mg/L
Nickel above 1.0 mg/L
Nitrite ion above 0.8 mg/L
Sample pH should be between 3 and 4 to avoid developed color to
fade or turbidity formation.
Iron LR
• Press the Zero key. The display will show “-0.0-” when the meter is zeroed and ready for
measurement.
• Remove the cuvette.
• Fill another graduated mixing cylinder up to the 25 mL
mark with the sample.
• Add the content of one packet of HI 93746-0 TPTZ reagent,
close the cylinder and shake vigorously for 30 seconds. This
is the reacted sample.
• Fill a cuvette with 10 mL of the reacted sample up to the
mark and replace the cap.
• Insert the sample into the instrument.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively, wait
for 30 seconds and press Read. When the timer ends the meter will perform the reading. The
instrument displays concentration in µµµµµ g/L of iron.
12
3
6
9
30"
25 mL
10 mL