multi EA 5100
Function and design
29
4.1.2.5 Measuring gas dryer
Measuring gas is dried in accordance with the measuring method:
¡
To determine TS, TN, TC, EC/OC via membrane dryer:
The membrane dryer is mounted on the furnace. To increase drying effectiveness,
purge gas (O
2
) is drawn through the membrane dryer with a pump. The membrane
dryer is maintenance-free.
Figure 17Membrane dryer
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To determine TX, AOX, EOX via concentrated sulfuric acid:
Sulfuric acid is dried in the Cl module 5100. The measuring gas is routed to the sul-
furic acid container via a transfer line.
¡
To determine TOC, NPOC, TIC via condensation with Peltier cooling in the
TOC module 5100.
4.2
Sampling modules
4.2.1
Auto-injector
There are two types of auto-injector. The classic auto-injector is suitable for vertical and
horizontal operation mode, while the Autoinjector AI-EA is only used in vertical opera-
tion mode.
The auto-injectors are suitable for the following applications:
¡
In vertical operation mode for non-viscous liquids and colorless EOX extracts
¡
In horizontal operation mode only for volatile liquids
The auto-injectors are
unsuitable
for the following sample types:
¡
Viscous liquids and their solutions
¡
Solids suspended in solution
¡
Colored EOX extracts
¡
Water analyses (TC/NPOC determination)
