Hach DR/700 - Page 260

50-10
IRON, FERROUS, continued
USING ACCUVAC AMPULS
1. Install module
50.01
in a DR/700.
Note: Analyze samples
as soon as possible to
prevent air oxidation of
ferrous iron to ferric
iron, which is not
measured.
2. Press: I/O
The display will show
500 nm
and module number
50.01
3. After 2 seconds,
the display will show
a program number,
concentration units
and the zero prompt.
If necessary, press
the
UP ARROW key
until the lower
display shows
program number
50.02.1
4. Fill a cell with 10
mL of sample (the
blank). Cap. Collect
at least 40 mL of
sample in a 50-mL
beaker.
Note: In bright light use
a 10-mL cell.
5. Fill a Ferrous Iron
AccuVac Ampul with
sample.
Note: Keep the tip
immersed while the
ampul fills completely.
6. Quickly invert the
ampul several times
to mix. Wipe off any
liquid or fingerprints.
Note: An orange color
will develop if ferrous
iron is present.
Note: Undissolved
powder does not affect
accuracy.