Hanna Instruments HI97105, Instruction Manual, Page: 32 / 40

Marine Nitrite ULR 32
7.8. MARINE NITRITE ULR
REQUIRED REAGENTS
Code
Description Quantity
HI764‑0 Marine Nitrite ULR Reagent 1 packet
REAGENT SETS
HI764‑25 Marine Nitrite ULR Reagent 25 tests
For other accessories see Accessories section.
MEASUREMENT PROCEDURE
Select the Nitrite Marine ULR method using the procedure described in Method Selection section.
Note : If tutorial mode is disabled, follow the measurement procedure below.
If the tutorial mode is enabled, press Measure and follow the messages on the screen.
• Fill the cuvette with 10 mL of unreacted sample (up to the mark).
Replace the plastic stopper and cap.
• Insert the cuvette into the holder and ensure that the notch on the cap
is positioned securely in the groove.
• Press Zero . The display will show “‑0.0‑” when the meter is zeroed and ready for measurement.
• Remove the cuvette.
• Add the content of 1 packet of
HI764‑0 Marine Nitrite ULR Reagent.
Replace the plastic stopper and the cap. Shake gently for about
15 seconds.
• Insert the cuvette into the holder and ensure that the notch on the cap
is positioned securely in the groove.
• Press Read . The display will show a 15 minute countdown prior to the measurement. To skip the timer,
press Read . When the timer ends, the meter will perform the reading. The instrument displays the results
in ppb of nitrite-nitrogen (NO
2
¯-N).
10 mL