Hanna Instruments HI83300 Instruction Manual page 135

• Reinsert the cuvette into the instrument and close the lid.
• Press Timer and the display will show the countdown prior to the measurement or, alternatively,
wait for 15 minutes and press Read. When the timer ends the meter will perform the reading.
The instrument displays concentration in µg/L of nitrite-nitrogen (NO
• Press  or  to access the second level functions.
• Press the Chem Frm key to convert the result to µg/L of nitrite (NO
(NaNO ).
2
• Press  or  to return to the measurement screen.
INTERFERENCES
Interference may be caused by the following ions: ferrous, ferric, cupric, mercurous, silver,
antimonious, bismuth, auric, lead, metavanadate and chloroplatinate.
Strongly reducing and oxidizing reagents.
High levels of nitrate (above 100 mg/L) could yield falsely high readings due to a minute amount
of reduction to nitrite that could occur at these levels.
-N).
-
2
¯) and sodium nitrite
2
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