DR/2400
Phosphorus, Reactive (Orthophosphate)
PhosphorusReac_TNT_Other_PV3_Eng_Ody.fm Page 1 of 6
• 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
Section 2.6.2 Reagent Blank on page 20 for more information.
Phosphorus, Reactive
(Orthophosphate)
(Method 8048
PhosVer
™
3 Method
Test ‘N Tube™ Vials
(0.06 to 5.00 mg/L PO
4
3–
or 0.02 to 1.60 mg/L P)
Scope and Application: For water, wastewater, and seawater; USEPA accepted for reporting
wastewater analysis*
* Procedure is equivalent to USEPA Method 365.2 and Standard Method 4500-P E for wastewater.
1. Touch
Hach Programs.
Select program
535 P React. PV TNT.
Touch
Start.
2. Use a TenSette
®
Pipet
to add 5.0 mL of sample
to a Reactive Phosphorus
Test ‘N Tube Dilution
Vial. Cap and mix.
3. Wipe the outside of
the vial with a damp
towel, followed by a dry
one, to remove
fingerprints or other
marks.
4. Install the 16-mm
adapter.
Note: See Section 2.6 in the
Instrument Manual for
installation details.
Place the vial into the
adapter.
Tips and Techniques
Test ‘N Tube Method 8048
Hach Programs
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