LaMotte DC1600 Colorimeter User Manual
Page 50
PROCEDURE
1.
Rinse a colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.
2.
Select setting 4 on the “Select Wavelength” knob and press the “30 Second Read” button.
3.
Insert the tube into the colorimeter chamber and adjust to 100%T with the “Set Blank” knob. This is the 100%T
blank.
4.
Remove tube from colorimeter. Use the 0.1 g spoon (0699) to add two measures of Manganese Buffer Reagent (6310).
Cap and mix until powder dissolves.
5.
Use the 0.15 g spoon (0727) to add one measure of *Manganese Periodate Reagent (6311). Cap and shake for one
minute. An undissolved portion of the reagent may remain in the bottom of the tube without adversely affecting the
test results. Wait two minutes for maximum color development. Solution will turn pink if manganese is present.
6.
At the end of the two minute waiting period, press the “30 Second Read” button and insert tube into the colorimeter
chamber. Record %T as soon as the reading stabilizes.
7.
Consult the calibration chart to determine manganese concentration in parts per million (ppm).
DC 1600 MANGANESE ~ HIGH RANGE CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
0.00
0.08
0.16
0.24
0.31
0.39
0.47
0.56
0.64
80
0.72
0.81
0.89
0.98
1.06
1.15
1.24
1.33
1.42
1.51
70
1.61
1.70
1.80
1.89
1.99
2.09
2.19
2.29
2.39
2.50
60
2.60
2.71
2.82
2.93
3.04
3.15
3.26
3.38
3.50
3.62
50
3.74
3.86
3.99
4.12
4.25
4.38
4.51
4.65
4.79
4.93
40
5.07
5.22
5.37
5.52
5.68
5.84
6.00
6.17
6.33
6.51
30
6.69
6.87
7.05
7.24
7.44
7.64
7.85
8.06
8.28
8.50
20
8.74
8.98
9.23
9.48
9.75
10.02
10
0
50