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DR/2400
Method 8146
Powder Pillows or AccuVac
Scope and Application:
* Adapted from Standard Methods for the Examination of Water and Wastewater, 15th ed. 201 (1980)
Tips and Techniques
• Analyze samples as soon as possible to prevent air oxidation of ferrous iron to ferric iron, which is not determined.
• 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
instrument manual for more information on Running a Reagent Blank.
• If ferrous iron is present, an orange color will form after adding the reagent.
Powder Pillows
Hach Programs
1.
Touch
.
Hach Programs
Select program
.
255 Iron, Ferrous
Touch
.
Start
IronFer_AVPP_Other_PHE_Eng_Ody.fm
®
Ampuls
For water, wastewater, and seawater
25 mL
20 mL
10 mL
2.
Fill a clean, round
sample cell with 25 mL
of sample.
1, 10 Phenanthroline Method*
25 mL
20 mL
10 mL
3.
Add the contents of
one Ferrous Iron Reagent
Powder Pillow to the
sample cell (the prepared
sample). Swirl to mix.
Iron, Ferrous
(0.02 to 3.00 mg/L)
.
See the
Method 8146
4.
Touch the timer icon.
Touch
.
OK
A three-minute reaction
period will begin.
Iron, Ferrous
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