Hach DR2400 - Nitrite; Method 10019; Test N Tube Vials; Diazotization Method

DR/2400
Nitrite
Nitrite_TNT_Low_DAZ_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.
• 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 10019
Diazotization Method
Test ‘N Tube™ Vials
LR (0.003 to 0.500 mg/L NO
2
–
–N)
Scope and Application: For water, wastewater, and seawater
1. Touch
Hach Programs.
Select program
345 N, Nitrite LR TNT.
Touch
Start.
2. Fill a Test ‘N Tube
NitriVer
®
3 Nitrite vial
with 5 mL of sample.
3. Cap and shake to
dissolve the powder (this
is the prepared sample).
A pink color will develop
if nitrite-nitrogen is
present.
4. Touch the timer icon.
Touch
OK.
A 20-minute reaction
period will begin.
Tips and Techniques
Test ‘N Tube Method 10019
Hach Programs