Hach POCKET COLORIMETER II Instruction Manual page 13

Nitrogen, Free Ammonia and Chloramine (Mono),
10.
Cap the cell and mix.
If the sample becomes
Note:
cloudy by the end of the
reaction period, pretreat the
sample and retest. See
Interferences on page
HRS MIN SEC HRS MIN SEC
11.
Wait five minutes.
Color development
Note:
time is dependent on sample
temperature. See
page 20. for correct times.
1—18.
Table1 on
1—13
continued
M
12.
Place the prepared
Monochloramine sample
into the cell holder.