Metrohm 872 Extension Module - Manual (Page 35)

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4 Installation
872 Extension Module IC Module
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3 Wadding 4 CO
2
adsorber
Adsorbs CO
2
from the air (e.g. Merck soda
lime with indicator, no. 6839.10).
5 Eluent 6 Aspiration filter 6.2821.090
7 Filter holder
From accessories set 6.2744.210. 8 Clamping screw
From accessories set 6.2744.210.
9 Tubing weighting
From accessories set 6.2744.210. 10 Eluent bottle 6.1608.070
11 Bottle attachment 6.1602.160 12 SGJ clip 6.2023.020
13 Tubing nipple 14 Threaded stopper
4.5 Eluent degasser
Gas bubbles in the eluent lead to an unstable baseline, as high pressure
pumps can transport liquids, but not gases. The eluent therefore has to be
degassed, before it reaches the high pressure pump.
The eluent degasser removes gas bubbles and dissolved gases from the
eluent. For degassing, the eluent flows into a vacuum chamber through a
special fluoropolymer capillary.
Note
The eluent degasser is already installed in the newly delivered instru-
ment. The following installation instructions must only be followed, if
the connections to the degasser had to be disconnected for mainte-
nance.