Metrohm 761 Compact IC User Manual
Page 197
5.3 Faults and malfunctions
761 Compact IC
187
Malfunction
Cause
Rectification
Chromatograms
with poor resolu-
tion, change in the
retention times
•
Deterioration in
separation efficiency of
the IC column
•
Regenerate column (see
section 5.1.1) or replace
column
Extreme peak
broadening,
splitting (double
peaks)
•
Dead volume at the
column ends
•
Fill column with glass
beads (
∅
≤
100
µ
m) or
replace column
No feed of
regeneration or
rinsing solution
for suppressor
•
Contact pressure too
low
•
Leak in system
•
Defective pump tubing
•
Contamination of the
filter in the 6.2821.120
Filter unit PEEK
•
Counterpressure at
suppressor module too
high
•
Adjust contact pressure
(see section 2.9.2)
•
Check connections and
make leakproof
•
Replace pump tubing (see
section 5.2.9)
•
Replace the 6.2821.130
Filter (see section 2.3.6)
•
Clean or replace suppres-
sor (see section
5.2.6
…
5.2.8)