243
Method 8192
NITRATE, Low Range (0 to 0.50 mg/L NO
3
-
-N)
For water, wastewater and seawater
*
Cadmium Reduction Method
* Seawater requires a manual calibration; see Interferences.
1. Enter the stored
program number for low
range nitrate nitrogen
(NO
3
-
-N).
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: 55 ENTER
The display will show
mg/L, NO3-N and the
ZERO icon.
Note: For alternate forms
(NO
3
), press the
CONC key.
3. Fill a 25-mL
graduated mixing
cylinder to the 15-mL
mark with sample.
Note: Adjust the pH of
stored samples before
analysis.
4. Add the contents of
one NitraVer 6 Nitrate
Reagent Powder Pillow
to the cylinder. Stopper.
Note: It is necessary to
remove all the powder from
the foil pillow. Tap the
pillow until no more
powder pours out. Be sure
to remove powder from the
corners of the pillow.
To Next Page
Loading...
