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METHOD PROCEDURES
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59
NITRATE
• Press Chem Frm to convert the result to mg/L of nitrate (NO
3
¯).
• Press the or key to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
• Ammonia and amines, as urea and primary aliphatic amines
• Chloride above 100 mg/L
• Chlorine above 2 mg/L
• Copper, Iron (Ferric), Strong oxidizing and reducing substances
• Sulfide must be absent
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