Hanna Instruments HI83325 - Page 53

53
METHOD PROCEDURES
53
53
IRON(II)/(III)
• Press Timer and the display will show the countdown prior to the measurement or wait 3 minutes
and press Read 1. The instrument displays the result in mg/L of Iron (Fe
2+
).
Warning: Timing is critical for accurate measurement. Reaction times beyond 3 minutes may
cause some ferric iron (Fe
3+
) o also react, producing false high measurements.
• Remove the plastic stopper and the cap from the cuvette
and add the content of one packet of HI96777B-0
Iron(II)/(III) Reagent B. Replace the plastic stopper and
the cap. Shake gently for 30 seconds.
• Insert the cuvette into the holder and close the lid.
Note: If Zero is pressed, the instrument returns to
measure Iron(II) (Fe
2+
).
• Press Timer and the display will show the countdown prior to the measurement or wait 3 minutes
and press Read 2. The instrument displays the result in mg/L of Iron(III) (Fe
3+
).