Hach DR/700 Procedures Manual page 470

COPPER,
continued
USING ACCUVAC AMPULS
1.
Install module
55.01
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.
4.
Fill a 10-mL cell
to the 10-mL line
with 10 mL of sample
(the blank). Collect
at least 40 mL of
sample in a 50-mL
beaker.
2.
Press:
I/O
The display will show
550 nm
and module number
55.01
5.
Fill a CuVer 2
AccuVac Ampul with
sample.
Note: Keep the tip
immersed while the
ampul fills completely.
Note: For proof of
accuracy, use a
1.00 mg/L copper
standard solution
(preparation given in
Accuracy Check) in
place of the sample.
55-22
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
55.05.1
6.
Quickly invert the
ampul several times
to mix. Wipe off any
liquid or fingerprints.
Note: A purple color
will form if copper is
present.
Note: Accuracy is not
affected by undissolved
powder.