Hach DR/700 Procedures Manual page 135

PALLADIUM
For palladium-tin activator baths
N,N'-Dimethyldithiooxamide Method
1.
Install module
42.01
in a DR/700.
4.
Fill two 25-mL
mixing cylinders to
the 20-mL mark with
demineralized water.
(0 to 250 mg/L)
2.
Press:
I/O
The display will show
420 nm
and module number
42.01
5.
Add 5.0 mL of
concentrated
hydrochloric acid to
each cylinder. Swirl
to mix.
Note: Use a Mohr pipet
and pipet filler.
42-51
Method 8144
3.
After 2 seconds,
the display will show
a program number,
the concentration
units and the zero
prompt. If necessary,
press the
UP ARROW
key until the lower
display shows
program number
42.07.1
6.
Add on 0.2-gram
scoop of
2,2'bipyridine to each
cylinder. Cap and
invert to mix.
Note: Because of
2,2'bipyridine's density,
approximately 0.1 gram
fills a 0.2-gram scoop.