Thermo Scientific Dionex Easion, Руководство оператора

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Dionex Easion Operator’s Manual
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Doc. 155028-01 08/20
column, carrying the contents of the sample loop with it. For a
description of how to inject samples manually, see
Section 3.11.2 . For
a description of how to inject samples with an autosampler, see
Section 3.11.4 .
2.3.4 Dionex CRS 500 Suppressor
The Dionex CRS 500 suppressor reduces the conductivity of the eluent
and enhances the conductivity of the sample ions, thereby increasing
detection sensitivity.
A process called Displacement Chemical Regeneration (DCR) (see
Section 2.3.5 ) pushes regenerant from the regenerant bottle and through
the suppressor. The constant flow of regenerant over the suppressor
membrane continually restores the suppression ability of the suppressor.
For more information about the suppressors, refer to the Dionex CRS 500
manual.
2.3.5 Displacement Chemical Regeneration (DCR)
Displacement Chemical Regeneration (DCR) is the process that restores
the ability of the Dionex CRS 500 suppressor to suppress eluent
conductivity. In DCR, the eluent that exits the cell is pumped into the
regenerant bottle. The eluent pressurizes the bottle and pushes the
regenerant into the suppressor. However, because the eluent is a different
density than the regenerant, it remains separate.
•
In the anion DCR process (see Figure 2-7 ), the eluent is less dense
than the regenerant and it remains on the top of the bottle, forcing the
regenerant into the regenerant line at the bottom of the bottle and out
into the suppressor.
•
In the cation DCR process (see Figure 2-8 ), the eluent is denser than
the regenerant and it flows to the bottom of the bottle. This displaces
the regenerant, pushing regenerant out of the regenerant line at the top
of the bottle and out into the suppressor.