Hach DR/700 Procedures Manual page 397

IODINE
(0 to 12.50 mg/L)
For water, wastewater and seawater
DPD Method* (Powder Pillows or AccuVac Ampuls)
USING POWDER PILLOWS
1.
Install module
52.01
in a DR/700.
Note: Samples must be
analyzed immediately
and cannot be preserved
for later analysis.
*Adapted from Palin, A.T. Inst. Water Eng. 1967, 21(6), 537-547.
2.
Press:
I/O
The display will show
525 nm
and module number
52.01
52-71
Method 8031
3.
After 2 seconds,
the display will show
a program number,
the concentration
units, decimal
position and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
52.11.1