LaMotte DC1600 Colorimeter User Manual
Page 52
PROCEDURE
1.
Rinse a colorimeter tube (0967) with sample water. Fill to the 10 mL line with sample.
2.
Select setting 5 on the “Select Wavelength” knob and press the “30 Second Read” button.
3.
Insert 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 1.0 mL pipet (0354) to add 2.0 mL (two measures) of *Hardness Buffer
Reagent (4255). Swirl to mix.
5.
Add 2 drops of *Sodium Cyanide, 10% (6565). Cap and mix.
6.
Use the 0.5 mL pipet (0369) to add 0.5 mL of *Manganese Indicator Reagent (3956). Cap and mix.
7.
Press the “30 Second Read” button and insert tube into the colorimeter chamber. Record %T as soon as the reading
stabilizes.
8. Consult the calibration chart to determine the manganese concentration in parts per million (ppm).
NOTE: For best results, carry a reagent blank through the procedure. Treat 10 mL of demineralized water with the
test procedure. This is the Reagent Blank. Set the reading to 86.8%T, which corresponds to 0 ppm, then continue
with the unknown sample tests.
DC 1600 MANGANESE ~ LOW RANGE CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
80
0.01
0.01
0.02
0.02
0.03
0.03
0.04
70
0.05
0.05
0.06
0.07
0.07
0.08
0.09
0.09
0.10
0.11
60
0.12
0.12
0.13
0.14
0.15
0.16
0.16
0.17
0.18
0.19
50
0.20
0.21
0.22
0.23
0.24
0.25
0.26
0.27
0.28
0.29
40
0.30
0.32
0.33
0.34
0.35
0.37
0.38
0.39
0.41
0.42
30
0.44
0.46
0.47
0.49
0.51
0.53
0.54
0.56
0.59
0.61
20
0.63
0.65
0.68
0.70
0.73
0.76
0.79
0.82
0.85
0.89
10
0
52