Hach DR/850, Procedures Manual, Page: 96 / 460

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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
Magnesium 1000 mg/L as CaCO
3
Manganese (VII) 10 mg/L
Lead 10 mg/L
Nitrate 100 mg/L N
Nitrite 50 mg/L N
Phosphate 100 mg/L PO
4
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 as N
Urea 10 mg/L as N
Zinc 5 mg/L
Table 11 Non-interfering Substances (Continued)
Substance Maximum Level Tested
Table 12 Interfering Substances
Interfering Substance
and its effect
Interference Level
Recommended
Treatment
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, High Range, continued