DR/2400
Nitrate
Nitrate_AVPP_Mid_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
®
5 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.
• This method is technique-sensitive. Shaking time and technique influence color development. For most accurate results, make
successive tests on a 10.0-mg/L Nitrate Nitrogen Standard solution. Adjust shaking times to obtain the correct result.
• Rinse the sample cell immediately after use to remove all cadmium particles. Retain the used sample for proper hazardous waste
disposal for cadmium.
• Prepared samples will contain cadmium and must be disposed of according to Federal, State and local hazardous waste
regulations. For information on pollution prevention and waste management, refer to Section 4.
Nitrate
Method 8171
Cadmium Reduction Method
Powder Pillows or AccuVac
®
Ampuls
MR (0.1 to 10.0 mg/L NO
3
–
–N)
Scope and Application: For water, wastewater, and seawater
1. Touch
Hach Programs.
Select program
353 N, Nitrate MR.
Touch
Start.
2. Fill a round sample
cell with 10 mL of
sample.
3. Add the contents of
one NitraVer 5 Nitrate
Reagent Powder Pillow
(this is the prepared
sample).
Cap.
4. Touch the timer icon.
Touch
OK.
A one-minute reaction
period will begin. Shake
the cell vigorously until
the timer beeps.
Tips and Techniques
Powder Pillows Method 8171
Hach ProgramsHach Programs
To Next Page
Loading...
Need help?
General
