UltiMate 3000 Series:
SD, RS, and BM Pumps
Page
88
Operating
Instructions
5.5.11 Vacuum Degasser (LPG-3400 and SRD-3x00)
5.5.11.1 General Notes for Degasser Operation
In normal operation, the degasser is quiet. Even if the vacuum pump is running, the
operating noise is very low. With higher load, the operating noise may slightly increase.
However, this does not impair the degassing performance.
In addition, observe the following to ensure optimum degassing performance:
Dionex recommends filling
all
channels with eluent and degassing
all
channels (even if
they are not used for the application). This will reduce the speed of the vacuum pump and
reduce the degasser noise.
To avoid contamination of the degasser, you should prepare fresh solvents, clean the
solvent lines, and rinse the degassing channels at regular intervals (
Dionex advises against recycling the solvents. This may impair the degassing
performance.
Before connecting the solvent lines, make sure that the connectors are free of
contaminants. Even minute particles can allow air to enter the degasser, and thus reduce
the degassing effectiveness.
When replacing solvents, make sure that the solvents are miscible. Mix immiscible
solvents with an intermediate solvent to replace them step-by-step.
Thoroughly rinse the degasser with methanol or isopropanol after operation. The alcohol
does not need to be removed afterward.
For longer periods of inactivity or when saliferous buffers are used (which may result in
salt crystallization in the gas separation membrane, thereby impairing the degassing
performance), rinse with de-ionized water followed by either methanol or isopropanol.
Observe the information about the solvent compatibility of the degasser (
page 78).
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