Hanna Instruments HI97105, Instruction Manual

Page: 31 / 40

31 Marine Nitrate HR
7.7. MARINE NITRATE HR
REQUIRED REAGENTS
Code
Description Quantity
HI782‑0 Marine Nitrate HR Reagent 1 packet
REAGENT SETS
HI782‑25 Marine Nitrate HR Reagent 25 tests
For other accessories see Accessories section.
MEASUREMENT PROCEDURE
Select the Nitrate Marine HR 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 the 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 one packet of
HI782‑0 Marine Nitrate HR Reagent.
Replace the plastic stopper and the cap. Shake vigorously for 2 minutes.
• 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 7 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 ppm of nitrate (NO
3
¯).
INTERFERENCES
Interference may be caused by:
• Nitrite
10 mL