Nitrate; Method 8039; Powder Pillows Or Accuvac - Hach DR2400 Manual

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Table of Contents

Scope and Application:

Tips and Techniques

• 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

instrument manual for more information on Running a Reagent Blank.

• A deposit of unoxidized metal will remain after the NitraVer

• This method is technique-sensitive. Shaking time and technique influence color development. For most accurate results, make

successive tests on a 10-mg/L Nitrate Nitrogen Standard solution. Adjust shaking time and technique to obtain the correct result.

• 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 immediately after use to remove all cadmium particles. 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 on page 55.

Powder Pillows

Hach Programs

Hach Programs

Select program

355 N, Nitrate HR

Nitrate_AVPP_HR_CDR_Eng_Ody.fm

For water, wastewater, and seawater.

Fill a round sample

cell with 10 mL of

Cadmium Reduction Method

HR (0.3 to 30.0 mg/L NO

5 dissolves. The deposit will not affect results.

Add the contents of

one NitraVer 5 Nitrate

Reagent Powder Pillow.

Cap (this is the prepared

Nitrate

Touch the timer icon.

A one-minute reaction

period will begin. Shake

the cell vigorously until

the timer beeps.