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DR/2400
Method 10021
Test 'N Tube™ Vials
Scope and Application:
Tips and Techniques
• This test requires a centrifuge.
• For safety, wear gloves while breaking ampules.
• 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.
• The ammonia salicylate reagent contains sodium nitroferricyanide. Cyanide solutions are regulated as hazardous wastes by the
Federal RCRA. Collect cyanide solutions for disposal as reactive (D001) waste. Be sure cyanide solutions are stored in a caustic
solution with pH >11 to prevent release of hydrogen cyanide gas. See Section 3 on page 27 for further information on proper
disposal of these materials.
• A green color will develop if inorganic nitrogen is present.
Test 'N Tube
Hach Programs
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
346 N, Inorganic TNT
Touch
.
Start
NitrogenTI_TNT_Other_TTR_Eng_Ody.fm
For water, wastewater, and seawater
2.
Pipet 1 mL of Total
Inorganic Nitrogen
Pretreatment Base
concentrate into each of
two Total Inorganic
Nitrogen Pretreatment
Diluent Vials.
Nitrogen, Total Inorganic
Titanium Trichloride Reduction Method
3.
Pipet 1 mL of sample
into one vial (this is
the prepared sample).
Pipet 1 mL of deionized
water into the second vial
(this is the blank).
(0.2 to 25.0 mg/L N)
Method 10021
4.
Cap the vials and
shake for 30 seconds to
mix.
Nitrogen, Total Inorganic
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