Metrohm 732 IC Detector - Manual (Page 145)

5 Notes – Maintenance – Faults
732 IC Detector / 733 IC Separation Center
138
5.2.5 Changing separating columns
Identical separation system
If you wish to replace an IC separating column by a column of the same
type, proceed as follows (see Fig. 16 and Fig. 17):
1 Remove old column
• Switch off pump drive of the 709 IC Pump.
• Unscrew column from inlet capillary 82 82 of the detector block
or from suppressor inlet capillary 89 89.
• Unscrew column from column connection capillary 67 67 or the
precolumn.
2 Connect new column to injector
• Remove end caps from column 76 76.
• Screw inlet end of separating column 76 76 (note flow direction)
to column connection capillary 67 67 or to the precolumn (see
section 2.8.4/section 2.8.6).
3 Rinse column
• Place beaker beneath the column outlet.
• Switch on 709 IC Pump and rinse column with eluent for ca.
10 min, then switch off pump.
4 Connect column to detector block
• Screw outlet end of separating column 76 76 to inlet capillary 82 82
or suppressor inlet capillary 89 89.
Changing the separation system
If you wish to replace an IC separating column by a column of a differ-
ent type, proceed as follows (see Fig. 16 and Fig. 17):
1 Remove old column
• Switch off pump drive of 709 IC Pump.
• Unscrew column from inlet capillary 82 82 of the detector block
or from the suppressor inlet capillary 89 89.
• Unscrew column from column connection capillary 67 67 or the
precolumn.
2 Connect detector block to injection valve
• Connect column connection capillary 67 67 using a 6.2620.060
Coupling directly to inlet capillary 82 82 of the detector block
(see Fig. 16).
3 Rinse with HNO
3
(passivation)
• Rinse IC system with c(HNO
3
) = 0.2 mol/L (flow rate
1 mL/min) for ca. 10 min.