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DR/2400
(
Method 8048
Powder Pillows or AccuVac
Scope and Application:
wastewater analyses**
* Adapted from Standard Methods for the Examination of Water and Wastewater
** Procedure is equivalent to USEPA method 365.2 and Standard Method 4500-P-E for wastewater.
Tips and Techniques
• 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
Section 2.6.2 Reagent Blank on page 20 for more information.
• A blue color will develop if phosphorus is present.
• 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.
Powder Pillows
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
490 P React. PV
Touch
.
Start
PhosphorusReac_AVPP_Other_PV3_Eng_Ody.fm
®
Ampuls
For water, wastewater, and seawater; USEPA Accepted for reporting for
2.
Fill a sample cell with
10-mL of sample.
Phosphorus, Reactive
(Orthophosphate)
PhosVer 3 (Ascorbic Acid) Method*
(0.02 to 2.50 mg/L PO
3.
Add the contents of
one PhosVer 3 phosphate
Powder Pillow to the cell.
Immediately cap and
invert to mix (this is the
prepared sample).
Phosphorus, Reactive (Orthophosphate)
3–
4
.
See
Method 8048
4.
Touch the timer icon.
Touch
.
OK
A two-minute reaction
period will begin.
If the sample was digested
using the Acid Persulfate
digestion, a ten-minute
reaction period is
required.
Page 1 of 6
)
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