Metrohm 761 SD Compact IC - Manual (Page 96)

6 Notes – Maintenance – Faults
761 SD Compact IC / Instructions for Use 8. 761.1043
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6 Notes – Maintenance
– Faults
6.1 Practical notes on ion chromatography
6.1.1 Separating columns
Separation efficiency
If difficulties occur, always first check the quality of the column by re-
cording a standard chromatogram.
You will find general tips on handling IC separating columns in
Metrohm Monography 8.732.2001 "Ion chromatography".
Protection
Using the interchangeable Metrosup RP Guard (6.1011.020) serves to
protect the actual separating column and substantially prolongs its ser-
vice life.
Storage
Always store separating columns closed and filled in accordance with
the manufacturer’s instructions when not in use.
Dead volume
Dead volume in the column can be the cause of extreme peak broad-
ening or splitting (occurrence of double peaks).
Regeneration
If the separation properties of the column have deteriorated, it can be
regenerated in accordance with the column manufacturer’s specifica-
tions. The instructions for regeneration can be found on the leaflet en-
closed with the column.
6.1.2 High-pressure pump
Pulsation dampener
It serves to reduce disturbing pulsations in the case of highly sensitive
measurements and also offers protection against pressure shocks act-
ing on the column material caused by injection (installation, see Section
2.15).