DR/2400
Nitrogen, Total Inorganic
NitrogenTI_TNT_Other_TTR_Eng_Ody.fm Page 1 of 6
• 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.
Nitrogen, Total Inorganic
Method 10021
Titanium Trichloride Reduction Method
Test ‘N Tube™ Vials
(0.2 to 25.0 mg/L N)
Scope and Application: For water, wastewater, and seawater
1. Touch
Hach Programs.
Select program
346 N, Inorganic TNT.
Touch
Start.
2. Pipet 1 mL of Total
Inorganic Nitrogen
Pretreatment Base
concentrate into each of
two Total Inorganic
Nitrogen Pretreatment
Diluent Vials.
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).
4. Cap the vials and
shake for 30 seconds to
mix.
Tips and Techniques
Test ‘N Tube Method 10021
Hach ProgramsHach Programs
To Next Page
Loading...
