LaMotte DC1600 Colorimeter User Manual
Page 14
PROCEDURE
1.
Rinse a clean colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.
2.
Select setting 6 on “Select Wavelength” knob and press “30 Second Read” button.
3.
Insert tube into colorimeter chamber and adjust to 100% T with “Set Blank” knob. This is the 100% T blank.
4.
Remove tube from colorimeter. Use the 1.0 mL plastic pipet (0354) to add 2.0 mL of *Ammonia #1 (3978). Cap and
mix.
5.
Use the 0.15 g spoon (0727) to add two measures of *Salicylate #2 (7457). Cap and mix until dissolved. Wait 1
minute.
6.
At end of 1 minute waiting period use 0.1 g spoon (0699) to add two measures of *Salicylate #3 (7458). Cap and
shake vigorously for 30 seconds. Wait 12 minutes for maximum color development.
7.
At the end of 12 minute waiting period, press “30 Second Read” button and insert tube into colorimeter chamber.
Record % T as soon as reading stabilizes.
8.
Consult calibration chart to determine ammonia -nitrogen concentration in parts per million (ppm).
DC1600 AMMONIA NITROGEN ~ LOW RANGE CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
80
70
60
0.00
0.01
0.02
0.03
0.04
0.04
0.05
50
0.06
0.07
0.08
0.09
0.10
0.11
0.12
0.13
0.14
0.15
40
0.17
0.18
0.19
0.20
0.21
0.23
0.24
0.25
0.27
0.28
30
0.30
0.31
0.33
0.34
0.36
0.38
0.40
0.41
0.43
0.45
20
0.47
0.50
0.52
0.54
0.57
0.59
0.62
0.65
0.68
0.71
10
0.75
0.79
0.82
0.87
0.91
0.96
1.02
0
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