multi X 2500
POX determination
83
9
POX determination
Sample preparation
Purging organically bound halogens in the argon stream,
argon supply via gas outlet "ABD OUT" on the basic device
Operating mode:
vertical
Measuring cell
"sensitive"
Measuring range
1 to 100 µg Cl
Electrolyte volume
15 to 20 ml
Combustion tube
Open combustion tube
Sample supply
via POX sluice as an attachment to the combustion tube
Auto-injector and autosampler cannot be used
For the POX determination organically bound halogens contained in the water sample
are purged with argon under defined conditions and combusted in the oxygen stream.
During this process, they are transformed into hydrogen halides whose mass
concentration is determined as chloride.
The analyzer is operated in its default configuration in vertical operating mode with
open combustion tube and measuring cell "sensitive". Refer to chapter "AOX
determination in vertical operating mode (recommended)" on page 54 for information
on the preparation of the analyzer and the measuring cell and the execution of the
measurements.
The connection of the sample container to the multi X 2500 is shown in the hose
diagram and described in the following section. The temperature of the sample
container is controlled in a water bath outside the analyzer. The user is responsible for
properly carrying out this process.
9.1
Performing measurements
Fig. 44 Hose diagram POX determination
