Hanna Instruments HI 83218-01 - Manual (Page 17)

17 Ammonia HR
• Remove the cuvette.
• Add 4 drops of HI 93733A-0 Nessler Reagent. Replace
the cap and mix the solution.
• Reinsert the cuvette 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. When the timer ends the meter will perform the
reading. The instrument displays the results in mg/L of ammonium nitrogen (NH
3
-N).
• Press  or  to access the second level functions.
• Press the Chem Frm key to convert the result in mg/L of ammonia (NH
3
) and ammonium (NH
4
+ ).
• Press  or  to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Acetone, alcohols, aldehydes, glycine, hardness above 1 g/L, iron, organic chloramines, sulfide, various
aliphatic and aromatic amines.