2 maintenance, Maintenance – Metrohm Inline Dialysis User Manual
Page 26
4.2 Maintenance
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IC equipment: Dialysis
4.2
Maintenance
The dialysis membrane may need to be replaced:
￭
if the signal intensity during dialysis decreases.
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if the dialysis membrane dries out.
￭
if the dialysis membrane becomes damaged as a result of depositions
or bacterial growth.
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if the sample channel is blocked (i.e., the sample can no longer be
pumped through the dialysis cell).
Replacing the dialysis membrane
1 Disassembling the dialysis cell
￭
Unscrew the four capillaries from the dialysis cell and remove the
cell from the cell holder.
￭
Remove the five screws completely with the hex key (6.2621.070)
and disassemble the dialysis cell.
￭
Remove the used dialysis membrane.
2 Preparing the dialysis membrane
Carry out steps 2 to 8 in Chapter 3.1 Preparing the dialysis cell on
page 6.
3 Connecting the dialysis cell
￭
Tighten the sample inlet capillary to the dialysis cell inlet for the
sample (3-4) using a PVDF pressure screw (6.2744.000).
￭
Tighten the sample outlet capillary to the dialysis cell outlet for
the sample (3-3) using a PVDF pressure screw (6.2744.000).
￭
Tighten the acceptor inlet capillary to the dialysis cell inlet for the
acceptor solution (3-5) using a PVDF pressure screw (6.2744.000).
￭
Tighten the acceptor outlet capillary to the dialysis cell outlet for
the acceptor solution (3-6) using a PVDF pressure screw
(6.2744.000).
4 Conditioning the dialysis system