26
• Remove the cuvet.
• Add 4 drops of the First reagent (6
drops in case of seawater analysis).
Replace the cap and mix the
solution.
• Add 4 drops of the Second reagent
(10 drops in case of seawater
analysis). Replace the cap and mix
the solution.
• Reinsert the cuvet into the instrument.
• Press TIMER and the display will show the countdown prior to the
measurement or, alternatively, wait for 3 minutes and 30 seconds
and press READ DIRECT. In both cases “SIP” will blink during
measurement.
• The instrument directly displays concentration in mg/L of ammonia
nitrogen (NH
3
-N) on the display.
• To convert the reading to mg/L of ammonia (NH
3
), multiply by a
factor of 1.216.
INTERFERENCES
Interference may be caused by:
acetone, alcohols, aldehydes, glycine, hardness above 1 g/L, iron,
organic chloramines, sulfide, various aliphatic and aromatic amines.
Ammonia MR
x 4
x 4
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