TX/TOX determination
multi X 2500
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TX/TOX determination
Sample preparation
none
Operating mode:
horizontal
vertical (for liquid, highly vaporizable samples which can be
metered with a syringe)
Measuring cell
"sensitive"
"high sensitive"
"high
concentration"
Measuring range
1 to 100 µg Cl
0.01 to 10 µg Cl
10 to 1000 µg Cl
Electrolyte volume
15 to 20 ml
65 ml
120 ml
Combustion tube
Multi-purpose combustion tube
automatic sample
introduction
Transferring solid samples with an automatic boat feeder
(ADB), for large sample series in combination with
autosampler autoX 112 (with AOX/solids rack)
Transferring liquid samples with an auto-injector, for large
sample series in combination with autosampler autoX 112
(with EOX/liquids rack)
The analyzer multi X 2500 allows determining the total chlorine content (TX) and/or
the total content of organically bound chlorine (TOX) in solid and liquid samples. Solid
and highly viscous liquid samples (max. 100 mg) are weighed in in quartz glass boats.
Liquid highly vaporizable samples (max. 100 µl) can be metered to the combustion
tube using µl-syringes. The samples are combusted in an argon/oxygen stream
without any further sample preparation. During this process, organic halogenated
compounds are transformed into hydrogen halides. Their mass concentration is
determined as chloride.
Depending on the sample matrix, the TX determination is carried out in horizontal
operating mode or vertical operating mode. In horizontal operating mode the samples
are introduced to the multi-purpose combustion tube by means of an automatic
sample feeder. In vertical operating mode an auto-injector or the autosampler
autoX 112 meters liquid samples directly into the multi-purpose combustion tube. The
vertical operating mode is primarily used for analyzing pure fuels and solvents. The
transformed hydrogen halides are quantified in one of the three measuring cells.
Which of the three cells they are analyzed in depends on their chlorine content.
When analyzing organic samples in horizontal operating mode it is highly
recommended to equip the analyzer with the optional flame sensor. The flame sensor
is connected to the ABD and controls the speed with which the boats are introduced.
This helps to prevent strong soot formation inside the combustion tube.
