Hach DR/700 - Page 257

50-7
Method 8146
IRON, FERROUS (0 to 5.00 mg/L)
For water, wastewater and seawater
1,10 Phenanthroline Method*
(Powder Pillows or AccuVac Ampuls)
USING POWDER PILLOWS
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
50.01.1
*Adapted from Standard Methods for the Examination of Water and Wastewater