Hach DR/700 Procedures Manual page 93

COPPER
For water, wastewater and seawater
Porphyrin Method*
1.
Install module
42.01
in a DR/700.
Note: If samples cannot
be analyzed
immediately, see
Sampling and Storage
following these steps.
Adjust the pH of stored
samples before analysis.
*Adapted from Ishii and Koh, Buseki Kagaku, 28, 473 (1979)
(0 to 250 µg/L)
2.
Press:
The display will show
420 nm
and module number
42.01
Note: Total copper
determination needs a
prior digestion; use
either the Digesdahl or
vigorous digestion
(Section 1).
3.
I/O
the display will show
a program number,
the concentration
units and the zero
prompt. If necessary,
press the
key until the lower
display shows
program number
42-9
Method 8143
After 2 seconds,
UP ARROW
42.02.1