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134
8.41. NITRITE, MARINE ULTRA LOW RANGE
SPECIFICATIONS
Range
0 to 200 µg/L (as N0
2
‑
‑N)
Resolution
1 µg/L
Accuracy
±10 µg/L ±4% of reading at 25 °C
Light Source
LED with narrow band interference filter @ 466 nm
Method
Adaptation of the EPA Diazotization method 354.1.
REQUIRED REAGENTS
Code
Description Quantity
HI764‑25
Nitrite Ultra Low Range Reagent
1 packet
REAGENT SETS
HI764‑25
Reagents for 25 tests
For other accessories see page 200.
MEASUREMENT PROCEDURE
• Select the
Nitrite, Marine ULR
method using the procedure
described in the Method Selection section (see page 18).
• Fill the cuvette with 10 mL of unreacted sample (up to the
mark) and replace the cap.
• Place the cuvette into the holder and close the lid.
• Press the
Zero
key. The display will show “‑0.0‑” when the meter is zeroed and ready for
measurement.
• Remove the cuvette.
• Add one packet of
HI764‑25
Nitrite Ultra Low Range
Reagent. Replace the cap and shake gently for about
15 seconds.
10 mL
NITRITE
, MARINE UL
TRA LOW RANGE