Hach DR/850 - Page 88

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Bromine 15 mg/L Br
2
Calcium 1000 mg/L CaCO
3
Chloride 18,000 mg/L
Chlorine Dioxide 5 mg/L ClO
2
Chromium (III) 5 mg/L
Copper 10 mg/L
Cyanide 10 mg/L CN
-
Free chlorine 10 mg/L Cl
2
Glycine 1 mg/L N
Iron (II) 10 mg/L
Iron (III) 10 mg/L
Lead 10 mg/L
Nitrate 100 mg/L as N
Nitrite 50 mg/L N
Phosphate 100 mg/L PO
4
3–
Silica 100 mg/L SiO
2
Silver 10 mg/L
Sulfate 2600 mg/L
Sulfite 50 mg/L SO
3
2–
Tyrosine 1 mg/L N
Urea 10 mg/L N
Zinc 5 mg/L
Table 9 Non-interfering Substances (Continued)
Substance Maximum Level Tested
Table 10 Interfering Substances
Interfering Substance
and its effect
Interference Level
Recommended
Treatment
Magnesium + Above 400 mg/L
CaCO
3
Add 5 drops Rochelle
Salt Solution prior to
testing.
Manganese (+7) – Above 3 mg/L
Ozone – Above 1 mg/L Usually doesn’t coex-
ist with monochlora-
mine.
Sulfide + Turns a “rust” color if
present.
Usually doesn’t coex-
ist with monochlora-
mine.
Thiocyanate – Above 0.5 mg/L
CHLORAMINE, MONO, Low Range, continued