Hach DR/850 - IRON, FERROUS, 1,10 Phenanthroline Method

189
Method 8146
IRON, FERROUS (0 to 3.00 mg/L) For water, wastewater, and seawater
1,10 Phenanthroline Method
*
(Powder Pillows or AccuVac Ampuls)
Using Powder Pillows
* Adapted from Standard Methods for the Examination of Water and Wastewater.
1. Enter the stored
program number for
Ferrous iron (Fe
2+
)-
powder pillows.
Press:
PRGM
The display will show:
PRGM ?
Note: Analyze samples as
soon as possible to prevent
oxidation of ferrous iron to
ferric iron, which is not
determined.
2. Press: 33 ENTER
The display will show
mg/L, Fe and the
ZERO icon.
3. Fill a sample cell
with 25 mL of sample
(the blank).
4. Place the blank into
the cell holder. Tightly
cover the sample cell
with the instrument cap.
5. Press: ZERO
The cursor will move to
the right, then the
display will show:
0.00 mg/L Fe
6. Fill another sample
cell with 25 mL
of sample.
7. Add the contents of
one Ferrous Iron
Reagent Powder Pillow
to the sample cell (the
prepared sample). Cap
and invert to mix.
Note: Undissolved powder
does not affect accuracy.
8. Press:
TIMER ENTER
A three-minute reaction
period will begin.
Note: An orange color will
form if ferrous iron is
present.