Hach DR/850 - NITRITE, Low Range Diazotization Method

249
Method 8507
NITRITE, Low Range (0 to 0.350 mg/L NO
2
-
-N) For water, wastewater, seawater
Diazotization Method
*
(Powder Pillows or AccuVac Ampuls);
USEPA approved for reporting wastewater and drinking water analyses.
* Federal Register, 44(85) 25505 (May 1, 1979)
1. Enter the stored
program number
for nitrite nitrogen
(NO
2
-
-N),
powder pillows.
Press:
PRGM
The display will show:
PRGM ?
Note: For most accurate
results, perform a Reagent
Blank Correction using
deionized water (see
Section 1).
2. Press: 60 ENTER
The display will show
mg/L, NO2-N and the
ZERO icon.
Note: For alternate forms
(NO
2
-
, NaNO
2
), press the
CONC key.
3. Fill a sample cell
with 10 mL of sample.
4. Add the contents of
one NitriVer 3 Nitrite
Reagent Powder Pillow
to the sample cell. Cap
the cell and shake
to dissolve.
Note: Accuracy is not
affected by undissolved
powder.