Hach POCKET COLORIMETER II Instruction Manual page 46

Color development time varies inversely with the temperature of the sample. Use
this table to determine the minimum color development time for a sample.
Table 3 Color Development Time Based on Sample Temperature
°C
5
7
9
10
12
14
16
18
20
23
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Sample Temperature
Chloramine (Mono),
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°F
40
42
48
50
54
58
61
68
73
75
1—45
continued
Time minutes
10
9
8
8
7
7
6
4
3
2½
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