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133
NITRA
TE
• Press the
Chem Frm
key to convert the result to
mg/L of nitrate (NO
3
¯).
•Press
or
to return to the measurement screen.
INTERFERENCES
Interference may be caused by:
Ammonia and amines, as urea and primary aliphatic amines
Chloride above 100 ppm
Chlorine above 2 ppm
Copper
Iron(III)
Strong oxidizing and reducing substances
Sulfide must be absent