Hach DR/700 Procedures Manual page 491

MANGANESE, LR
For water and wastewater
PAN Method* (Digestion required)
1.
Install module
55.01
in a DR/700.
Note: If samples cannot
be analyzed
immediately, see
Sampling and Storage,
below. Adjust the pH of
stored samples before
analysis.
*Adapted from Goto, K., et al., Talanta, 24, 752-3 (1977)
(0 to 0.800 mg/L)
2.
Press:
I/O
The display will show
550 nm
and module
55.01
Note: Total manganese
determination requires a
prior digestion; use any
of the three digestion
procedures given in
Digestion (Section 1).
55-43
Method 8149
3.
After 2 seconds,
the display will show
a program number,
concentration units
and the zero prompt.
If necessary, press the
key until
UP ARROW
the lower display
shows program
number
55.08.1