5 changing separating columns, Changing separating columns – Metrohm 861 Advanced Compact IC User Manual
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4.2 Maintenance and servicing
861 Advanced Compact IC / Instructions for Use 8.861.1033
71
rinsed free from salt with methanol/water (1:4) to avoid crystallization
of eluent salts with the corresponding subsequent damage.
For rinsing the connections to the separating column and the suppres-
sor module are removed; the two capillaries 26 and 44 (see Figure 14
and Figure 16) are directly connected to each other using a coupling.
Rinse with methanol/water (1:4) until the conductivity drops below
10
µ
S/cm.
Before taking it back into operation, rinse the system with eluent (be-
fore the connection of the separation column).
4.2.5
Changing separating columns
It is recommended that the precolumn is also changed each time you
change the separation column).
Identical separation system
If you wish to replace an IC separating column by a column of the same
type, proceed as follows (see Figure 14 and Figure 16):
1 Remove old column
•
Switch off high-pressure pump and wait for pressure to drop.
•
Unscrew column 73 from inlet capillary 44 of the detector
block or from suppressor inlet capillary 82.
•
Unscrew column 73 from column connection capillary 26 or
the precolumn.
2 Connect new column to injection valve
•
Remove end caps from column 73.
•
Screw inlet end of separating column 73 (note flow direction)
to column connection capillary 26 or to the precolumn (see
3 Rinse column
•
Place beaker beneath the column outlet.
•
Switch on high-pressure pump and rinse column with eluent
for approx. 10 min, then switch off pump.
4 Connect column to detector block
•
Screw outlet end of separating column 73 to inlet capillary 44
or suppressor inlet capillary 82.
Changing the separation system
If you wish to replace an IC separating column by a column of a diffe-
rent type, proceed as follows (see Figure 14 and Figure 16):
1 Remove old column
•
Switch off high-pressure pump and wait for pressure to drop.
•
Unscrew column 73 from inlet capillary 44 of the detector
block or from the suppressor inlet capillary 82.