1—48
Chlorine, Free and Total, HR,
continued
Monochloramine
For conventional free chlorine disinfection (beyond the
breakpoint), monochloramine concentrations are very low. If
monochloramine is present in the sample, its interference in the
free chlorine test varies with the temperature, the relative
amount of monochloramine to free chlorine, and the time
required to do the analysis. Approximate interference levels of
monochloramine in the free chlorine test are listed below (as
mg/L Cl
2
).
Ozone
Interferes at all levels.
Interfering
Substance
Interference Levels and Treatments
NH
2
Cl
Sample Temperature °C (°F)
(as Cl
2
)
5 (40)
10 (50)
20 (68)
30 (83)
1.2
0.2
0.2
0.3
0.3
2.5
0.4
0.5
0.6
0.6
3.5
0.5
0.6
0.7
0.8
Summary of Contents for POCKET COLORIMETER II
Page 13: ...1 13 Instrument Cap Cord continued Figure 1 Attaching the Instrument Cap Cord...
Page 14: ...1 14...
Page 38: ...1 38...
Page 73: ...1 73 pH continued 10 Press READ ENTER The display will show followed by results in pH units...
Page 77: ...2 1 Section 2 Instrument Manual...
Page 78: ...2 2...
Page 83: ...2 7 Instrument Operation continued Figure 1 Battery Installation...
Page 84: ...2 8...
Page 108: ...2 32...
Page 110: ...2 34...