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DR/2400
Method 10127
Test 'N Tube™ Vials
Scope and Application:
* Adapted from Standard Methods for the Examination of Water and Wastewater.
Tips and Techniques
• Place a safety shield in front of the COD reactor to prevent injury if splattering occurs.
• Reagent blanks can be used more than once, but should not be used more than one day.
• The final samples will contain molybdenum. In addition, the final samples will have a pH less than 2 and are considered corrosive
(D002) by the Federal RCRA. Consult the Material Data Safety Data Sheet for information specific to the reagents used.
Test 'N Tube
1.
Turn on the COD
Reactor. Heat to 150 °C.
Place the safety shield in
front of the reactor.
PhosphorusTot_TNT_High_MOL_Eng_Ody.fm
For water and wastewater
Hach Programs
2.
Touch
.
Hach Programs
Select program
.
541 P Total HR TNT
Touch
.
Start
Phosphorus, Total
Molybdovanadate Method with
Acid Persulfate Digestion*
HR (1.0 to 100.0 mg/L PO
3.
®
Use a TenSette
Pipet
to add 5.0 mL of
deionized water to a Total
Phosphorus Test 'N Tube
Vial (the blank).
3–
4
Method 10127
4.
Use a TenSette Pipet
to add 5.0 mL of sample
to a Total Phosphorus
Test 'N Tube Vial
(the sample).
Phosphorus, Total
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