Marine Nitrate LR
30
• Add the content of one packet of
HI781B‑0
Marine Nitrate LR Reagent into the
mixing cuvette. Replace the plastic stopper and cap. Shake vigorously for 1 minute.
• Remove the cap of the mixing cuvette. Thread the covered needle onto the
10 mL syringe, remove the plastic cover and draw up the contents of the mixing
cuvette into the syringe.
• Cover the needle with plastic cover and twist to remove. Add the filter to filter
holder assembly and attach to the 10 mL syringe using the threaded connection.
Hold the syringe and filter holder assembly over a cuvette (# 2).
• Very slowly, push the plunger into the 10 mL syringe until the 10 mL cuvette has been filled up to the
10 mL 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
HI781C‑0
Marine
Nitrate LR 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 an 8 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, Copper
# 2
# 2
# 1
