Oritron Dionex Ion Chromatography System ICS-2100 - Manual (Page 53)

2 • Features
Doc. 065291-01 3/09
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EPM Electrolytic pH Modifier and EGC CO
3
Mixer
The EGC II K
2
CO
3
EluGen
Cartridge can be used with an
EPM Electrolytic pH Modifier
(P/N 063175) (see
Figure 2-17 )
and an EGC CO
3
Mixer
(P/N 061686) to produce a
carbonate/ bicarbonate mixture.
The carbonate/bicarbonate
mixture is used with carbonate-
based IonPac columns for
anion exchange separations.
Figure 2-17. ICS-2100 with an EluGen Cartridge and EPM Installed
After the cartridge generates carbonate eluent, the pH Modifier adjusts
the eluent concentration to produce the carbonate/bicarbonate mixture.
The EGC CO
3
Mixer provides enough mixing to produce a homogenous
solution of electrolytically-generated K
2
CO
3
and KHCO
3
eluent.
For more information about these products, refer to the EluGen cartridge
manual. Cartridge manuals are included on the Dionex Reference Library
CD-ROM (P/N 053891).
Generating Carbonate/Bicarbonate Eluent
If a K
2
CO
3
EluGen cartridge and an EPM Electrolytic pH Modifier are
installed (connected to EGC-1 and EGC-2, respectively), set EGC-1 to
the concentration of K
2
CO
3
required for your application and set EGC-2
to the concentration of KHCO
3
required. In order to achieve the desired
K
2
CO
3
/KHCO
3
eluent mixture, the K
2
CO
3
cartridge must generate the
total of the two setpoint concentrations.
For example, for a 3.50 mM K
2
CO
3
/1.00 mM KHCO
3
eluent, set EGC-1
to 3.50 mM and EGC-2 to 1.00 mM. When the eluent is generated, the
K
2
CO
3
cartridge generates 4.50 mM K
2
CO
3
, which is then modified by
EPM
EluGen
Cartridge