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DR/2400
Method 8114
Test 'N Tube™ Vials
Scope and Application:
* Adapted from Standard Methods for the Examination of Water and Wastewater
Tips and Techniques
• Reagent blanks for each lot of reagents may be used more than once. At room temperature, the reagent blank is stable for up to
three weeks.
• The seven-minute reaction time in step 4 is for samples at 23 °C. For samples at 13 °C, wait 15 minutes. For samples at 33 °C,
wait two minutes.
• 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.
• Final samples will contain molybdenum. Also, 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
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
540 P React. HR TNT
Touch
.
Start
PhosphorusReac_TNT_High_MOL_Eng_Ody.fm
For water and wastewater
2.
®
Use a TenSette
Pipet
to add 5.0 mL of
deionized water to a
Reactive High Range
Phosphorus Test 'N Tube
Vial (this is the blank).
Cap and invert to mix.
Phosphorus, Reactive
Molybdovanadate Method*
HR (1.0 to 100.0 mg/L PO
3.
Use a TenSette Pipet
to add 5.0 mL of sample
to a Reactive High Range
Phosphorus Test 'N Tube
Vial (this is the sample).
Cap and invert to mix.
Phosphorus, Reactive (Orthophosphate)
(Orthophosphate)
3–
4
Method 8114
4.
Touch the timer icon.
Touch
.
OK
A 3-minute reaction
period will begin.
Read the sample within
two minutes after the
timer beeps.
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