Spectroquant Pharo 300 - Page 380

Platinum in water and
wastewater
Application
Place the cell into the
cell compartment.
Select method no. 134.
Pipette 5.0 ml of the
sample into an empty
round cell (Empty cells,
Cat.No. 114724).
Add 1.0 ml of reagent 1
with pipette, close the
cell with the screw cap,
and mix.
Add 5.0 ml Isobutyl-
methylketone GR
(Cat.No. 106146) with
pipette, close the cell
with the screw cap.
Aspirate the organic-
clear upper phase from
the tube with pipette and
dry over sodium sulfate
anhydrous (Cat.No.
106649).
Shake the cell vigorous-
ly for 1 minute.
Leave to stand to allow
phases to separate.
Check the pH of the
sample, specified value
:
pH 6.5.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Add 0.50 ml of
reagent 2 with pipette,
close the cell with the
screw cap, and mix.
Transfer the dried so-
lution into a rectangular
cell.
Heat the cell in the
thermoreactor at 100 °C
for 5 minutes.
Remove the cell from
the thermoreactor and
place in a test-tube rack
to cool to room tempera-
ture.
Check the pH of the
sample, specified range
:
pH 2 – 5.
If required, add dilute
sodium hydroxide
solution or sulfuric acid
drop by drop to adjust
the pH.
Note:
Empty cells with screw caps, Cat.No. 114724 are
recommended for the preparation.
These cells can be
sealed with the screw caps, thus enabling a hazard-free
mixing of the sample.
Measuring range: 0.10 – 1.25 mg/l Pt 10-mm cell
Attention! The measurement is carried out at 690 nm in a 10-mm rectangular cell against a blank, prepared
from distilled water (Water for analysis EMSURE
®
, Cat.No. 116754, is recommended) and the
reagents in an analogous manner.
Important:
The exact composition and preparation of the reagents 1
and 2 used are given in the corresponding application,
which also includes further inf
ormation on the method
employed. This application can be downloaded directly at
www.analytical-test-kits.com.
Release 06/2014 - Spectroquant
®
UV/VIS Spectrophotometer Pharo 300