LaMotte DC1600 Colorimeter User Manual
Page 70
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 the 100%T blank.
4.
Remove tube from colorimeter. Use the 0.1 g spoon (0699) to add one measure of Aminoantipyrine Reagent
(7825-C). Cap and mix until powder dissolves.
5.
Use the plain pipet (0352) to add 4 drops of *Ammonium Hydroxide Solution (7826). Cap and mix.
6.
Use the 1 mL pipet (0354) to add 2 mL of *Potassium Ferricyanide Solution (7827). Cap and mix. Solution will
almost immediately develop a reddish hue if phenols are present.
7.
Press “30 Second Read” button and insert tube into colorimeter chamber. Record %T as soon as reading stabilizes.
8.
Consult calibration chart to determine phenol concentration in parts per million (ppm).
DC1600 PHENOL CALIBRATION CHART
%T
9
8
7
6
5
4
3
2
1
0
90
0.00
0.02
0.04
0.07
0.09
0.11
0.14
80
0.16
0.19
0.21
0.24
0.26
0.29
0.31
0.34
0.37
0.39
70
0.42
0.45
0.48
0.51
0.54
0.56
0.59
0.62
0.65
0.69
60
0.72
0.75
0.78
0.81
0.85
0.88
0.91
0.95
0.98
1.02
50
1.06
1.09
1.13
1.17
1.21
1.25
1.29
1.33
1.37
1.42
40
1.46
1.51
1.55
1.60
1.65
1.70
1.75
1.80
1.85
1.90
30
1.96
2.01
2.07
2.13
2.19
2.26
2.32
2.39
2.46
2.53
20
2.60
2.68
2.76
2.84
2.92
3.01
3.10
3.20
3.30
3.41
10
3.52
3.64
3.76
3.89
4.03
4.18
4.34
4.52
4.70
4.9
0
5.14
5.39
5.68
6.02
70