Thermo Scientific Dionex Easion, Руководство оператора

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Dionex Easion Operator’s Manual
22
Doc. 155028-01 08/20
The following regenerant bottle assemblies are available for use with the
Dionex Easion:
•
The anion regenerant bottle assembly (P/N 068222) has a cap that is
labeled
ANION
. The
REGEN BOTTLE OUT
line extends to the bottom
of the bottle.
•
The cation regenerant bottle assembly (P/N 057713) has a cap that is
labeled
CATION
. The
REGEN BOTTLE OUT
line extends only about
1 cm (0.4 in) into the bottle.
For more information, refer to the installation instructions for the
Displacement
Chemical Regeneration (DCR) 2-Liter Kit (P/N 056882).
2.3.6 Conductivity Cell and Dionex DS5 Detection Stabilizer
The flow-through heated conductivity cell contains two 316 stainless steel
electrodes that are permanently sealed into the PEEK
™
cell body. The cell
measures the electrical conductance of analyte ions as they pass through
the cell.
Temperature directly affects the conductivity of a solution. For example,
laboratory heating and air conditioning systems can cause a regular slow
cycling in the baseline. This, in turn, can affect the reproducibility of an
analysis. The higher the conductivity, the more pronounced the effect.
In ion analysis, the effect of temperature variation is minimized by
suppressing eluent conductivity. Built-in preset temperature
compensation also ensures that there is no major change in the baseline or
in peak heights. Temperature compensation
further improves baseline
stability.
Direct conductive heating is used in the Dionex Easion conductivity cell
to provide temperature control and compensation. A heat exchanger
inside the cell regulates the temperature. All data is collected at 40 °C
(104 °F).
The cell is housed inside a Dionex DS5 Detection Stabilizer (P/N 067761)
(see
Figure 2-9 ), which helps to insulate the cell from fluctuations in
ambient temperature.