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The 820 IC Separation Center provides the thermal
and electrical protection for the wet-chemistry part
of an ion chromatography analysis. The stable polyurethane
housing ensures temperature stability; the electrically
conducting lacquer finish and the metallic network
incorporated in the housing provide an affective
shield against electromagnetic radiation.
All the analytical components, with the exception
of the pumps, are contained in the IC Separation
Center. Precolumns, separating columns, preconcentration
columns, detectors, pulsation absorber, the "MSM" Metrohm
Suppressor Module and valves therefore work under
steady and constant ambient conditions. The optimal
shielding of the 820 IC Separation Center guarantees
the optimal signal-to-noise behavior of the measured
values. The control electronics are located outside
the 820 IC Separation Center and are therefore protected
against moisture.
The latest Separation Center generation is available
with a built-in column oven. In this case two separating
columns together with precolumns are kept at a constant
temperature which can be set from 30 °C to 70 °C.
As the supply capillaries are also located in the
column oven this means that temperature gradients
within the system are reliably avoided.
The 820 Separation Center is remotely controlled
by the Metrodata IC
Net software.
The 2.820.0X10 Version of the IC Separation Center
is equipped with an electrically-operated 6-way injection
valve made from PEEK. This version is primarily intended
for cation and anion analysis without chemical suppression.
The 2.820.0X20 Version of the IC Separation Center
is equipped with two electrically-operated 6-way
injection valves made from PEEK. This version is
primarily suitable for combined cation and anion
analysis systems, for inline dialysis and for systems
with inline sample preconcentration or inline matrix
elimination. If chemical suppression is to be used
then the 820 Separation Center can simply be extended
by adding the 833
IC Liquid Handling Suppressor Unit (2.833.0020).
In addition to the electrical 6-way injection valve
made from PEEK, the 2.820.0X30 Version of the IC
Separation Center also already contains the "MSM" Metrohm
Suppressor Module. This is primarily used for chemical
suppression in anion analysis. The three "micro
packed bed" suppressors contained in a rotor
are characterized by their high capacity, long working
life and simple handling: one suppressor is in the
analytical circuit, the second is regenerated with
dilute sulfuric acid, and the third is rinsed with
deionized water. After each analysis the suppressor
moves one step forward so that a freshly regenerated
suppressor is always available. The reproducibility
is excellent - the individual suppressors cannot
be distinguished during the analysis.
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