Hach DR2400 - Nitrite; Method 8153; Powder Pillows

DR/2400
Nitrite
Nitrite_PP_High_FES_Eng_Ody.fm Page 1 of 4
• 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.
• After adding the reagent, a greenish-brown color will develop if nitrite is present.
• 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.
Nitrite
Method 8153
Ferrous Sulfate Method*
* Adapted from McAlpine, R. and Soule, B., Qualitative Chemical Analysis, New York, 476, 575 (1933)
Powder Pillows
HR (2 to 250 mg/L NO
2
–
)
Scope and Application: For water and wastewater
1. Touch
Hach Programs
Select program
373 N, Nitrite HR.
Touch
Start.
2. Fill a round sample
cell with 10 mL of
sample.
3. Add the contents of
one NitriVer
®
2 Nitrite
Reagent Powder Pillow.
Cap and shake to
dissolve (this is the
prepared sample).
4. Touch the timer icon.
Touch
OK.
A ten-minute reaction
period will begin.
To prevent low results,
leave the sample on a flat
surface and do not
disturb it during the
reaction period.
Tips and Techniques
Powder Pillows Method 8153
Hach Programs