DR/2400
Nitrate
Nitrate_PP_Low_CDR_Eng_Ody.fm Page 1 of 6
• For more accurate results, determine a reagent blank value for each new lot of reagent. Follow the procedure using deionized
water in place of the sample. Subtract the reagent blank value from the final results or perform a reagent blank adjust. See the
instrument manual for more information on Running a Reagent Blank.
• A deposit of unoxidized metal will remain after the NitraVer
®
6 dissolves. The deposit will not affect results.
• Wipe the outside of sample cells before each insertion into the instrument cell holder. Use a damp towel followed by a dry one to
remove fingerprints or other marks.
• Rinse the sample cell and mixing cylinder immediately after use to remove all cadmium particles.
• Properly dispose of the used sample. Prepared samples contain cadmium and must be disposed of according to Federal, State,
and local hazardous waste regulations. For information on pollution prevention and waste management, see Section 4 on
page 55.
• Shaking time and technique influence color development. Analyze a standard solution several times and adjust the shaking time
to obtain the correct result. Use this time for analyzing samples
Nitrate
Method 8192
Cadmium Reduction Method
Powder Pillows
LR (0.01 to 0.50 mg/L NO
3
–
–N)
Scope and Application: For water, wastewater, and seawater
1. Touch
Hach Programs.
Select program
351 N, Nitrate LR.
Touch
Start.
2. Fill a 25-mL
graduated mixing
cylinder with 15 mL of
sample.
3. Add the contents of
one NitraVer 6 Reagent
Powder Pillow to the
cylinder. Stopper.
4. Touch the timer icon.
Touch
OK.
Shake the cylinder
vigorously for three
minutes.
Tips and Techniques
Powder Pillows Method 8192
Hach Programs
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