LaMotte DC1600 Colorimeter User Manual
Page 46
PROCEDURE
1.
Rinse a clean colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.
2.
Select setting 3 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 100%T blank.
4.
Remove tube from colorimeter. Use the 0.5 mL pipet (0353) to add one measure of *Iron Reagent #1 (V-4450). Cap
and mix.
5.
Use the 0.1 g spoon (0699) to add 0.1 g of *Iron Reagent #2 (V-4451). Cap and shake vigorously for 30 seconds. Wait
three minutes for maximum color development.
6.
At the end of 3 minute waiting period, press “30 Second Read” button and insert tube into colorimeter chamber.
Record %T as soon as reading stabilizes.
7.
Consult calibration chart to determine iron concentration in parts per million (ppm).
DC1600 IRON ~ BIPYRIDYL CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
0.02
0.04
0.05
0.07
0.09
0.11
0.13
0.15
0.16
0.18
80
0.20
0.22
0.24
0.26
0.28
0.30
0.33
0.35
0.37
0.39
70
0.41
0.44
0.46
0.48
0.50
0.53
0.55
0.58
0.60
0.63
60
0.65
0.68
0.70
0.73
0.76
0.78
0.81
0.84
0.87
0.90
50
0.93
0.96
0.99
1.02
1.06
1.09
1.12
1.16
1.19
1.23
40
1.26
1.30
1.34
1.38
1.42
1.46
1.50
1.54
1.58
1.63
30
1.68
1.72
1.77
1.82
1.87
1.93
1.98
2.04
2.10
2.16
20
2.22
2.28
2.35
2.42
2.49
2.57
2.65
2.73
2.82
2.91
10
3.01
3.11
3.22
3.33
3.46
3.59
3.73
3.88
4.05
4.24
0
4.44
4.67
4.90
46