Endress+Hauser Analytik Jena Multi X 2500, Руководство по эксплуатации

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EOX determination multi X 2500
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7 EOX determination
Sample preparation Extraction of organically bound halogens using organic
solvents
Operating mode: vertical and horizontal
measuring cells "sensitive" "high sensitive"
Measuring range 1 to 100 µg Cl 0.01 to 10 µg Cl
Electrolyte volume 15 to 20 ml 65 ml
Combustion tube Multi-purpose combustion tube
manual sample
introduction
via injection port with septum, option: with auto-injector
automatic sample
introduction
vertical: with autosampler autoX 112 (with EOX/liquids rack
and dosing syringe)
horizontal: with automatic boat feeder (ABD) in combination
with autosampler autoX 112 (with EOX/liquids rack and
dosing syringe)
For EOX determination, the samples are prepared in accordance with the extraction
methods specified in the standards. The extracts (max. 100 µl) are combusted in the
argon/oxygen stream. During this process, they are transformed into hydrogen halides
whose mass concentration is determined as chloride in the chlorine module.
The EOX determination can be carried out in both vertical and horizontal operating
mode. The multi-purpose combustion tube is employed in both cases.
The transformed hydrogen halides are determined in the measuring cell "high
sensitive" or "sensitive" depending on the concentration of the sample. The use of the
measuring cell "high sensitive" is recommended for very low EOX contents.
For the EOX determination the extracts are introduced directly to the combustion tube
via the injection port. For this purpose, a screw cap with septum is attached to the
combustion tube. The auto-injector can be used for exact dosing of individual samples.
The autosampler autoX 112 is available for large sample series.
When determining EOX in horizontal operating mode, the autosampler autoX 112 is
combined with the automatic boat feeder (ABD). The extracts are injected to quartz
glass boats via the injection port with septum at the sluice of the ABD. The ABD then
transfers the loaded quartz glass boats to the combustion tube of the multi X 2500.
The samples have a high content of organic solvents. Therefore it is recommended to
equip the analyzer with a flame sensor when working in horizontal operating mode.
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.
Installation and commissioning of the ABD and the autoX 112 are described in the
respective devices' user manuals.