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Substance
Phosphate
Silica
Sulfate
Sulfite
Tyrosine
Urea
Zinc
Interfering Substance
and its effect
Magnesium
+
Manganese (+7)
–
Ozone
–
Sulfide
+
Thiocyanate
–
° C
5
7
9
10
12
14
16
18
20
23
25
>25
Sampling and Storage
Chloramine (Mono)_MP_Low_MCF_Eng_2400.fm
Table 1 (continued)
Maximum Level Tested
100 mg/L PO
4
100 mg/L SiO
2
2600 mg/L
2–
50 mg/L SO
3
1 mg/L N
10 mg/L N
5 mg/L
Interference Level
Above 400 mg/L CaCO
3
Above 3 mg/L
Above 1 mg/L
Turns a "rust" color if
present.
Above 0.5 mg/L
Sample Temperature
Analyze samples for monochloramine immediately after collection. Rinse the
sample container several times with sample, letting the container overflow each
time. If sampling from a tap, let the water flow for at least 5 minutes. Then cap
the container so that there is no head space (air) above the sample.
Table 2
Recommended
Add 5 drops Rochelle Salt Solution prior to testing.
OR: use the high range (HR) test.
Use the HR test; it will tolerate up to 10 mg/L.
Usually doesn't coexist with monochloramine.
Usually doesn't coexist with monochloramine.
Use the HR test; it will tolerate up to 2 mg/L.
Table 3
° F
40
42
48
50
54
58
61
68
73
75
77
>77
Chloramine (Mono)
Treatment
Minutes
10
9
8
8
7
7
6
4
3
2.5
2
2
Chloramine (Mono)
Page 3 of 6
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