Metrohm 930 Compact IC Flex ChS/Deg Manual page 96

6.1
Problem
Individual peaks are
greater than expec-
ted.
MSM – Insufficient
flow of regeneration
solution or rinsing
solution.
The background
conductivity is too
high.
The retention times
are poorly reprodu-
cible.
Baseline increasing
strongly.
Chromatograms
have poor resolution
￭￭￭￭￭￭￭￭
88
Cause
Sample – Sample carry-
over from previous meas-
urements.
There is a leak in the sys-
tem.
MSM – Back pressure too
high.
The MSM is not connected.
The incorrect eluent is
being used.
MSM – No or insufficient
flow of regeneration solu-
tion or rinsing solution.
The eluent path has a leak.
The eluent path is blocked.
The eluent contains gas
bubbles.
Insufficient flow of regener-
ation solution or rinsing
solution.
MSM – Reduced capacity.
SPM – Reduced capacity.
Separation column –
Diminished separating effi-
ciency.
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
Remedy
2. Notify Metrohm Service.
Check the rinsing time (see "Checking the rins-
ing time", page 83).
Check all connections.
Clean the MSM (see Chapter 5.11.3.4, page
77) or replace parts (see Chapter 5.11.3.5,
page 80).
Connect the MSM (see Chapter 3.11, page
29).
Change the eluent (see Chapter 5.4.2, page
55).
Check the flow of the regeneration solution
and of the rinsing solution .
Check all of the connections along the eluent
path and fix the leak.
Check the eluent path and eliminate the block-
age.
Check the connectors of the eluent degas-
￭
ser .
Deaerate the high-pressure pump (see
￭
Chapter 3.17, page 42).
See problem "MSM – Insufficient flow of
regeneration solution or rinsing solution."
Regenerate the MSM (see Chapter 5.11.3.2,
page 75).
Regenerate the SPM (see Chapter 5.11.3.2,
page 75).
Regenerate the separation column (see
￭
Chapter 5.14.4, page 84).
Replace the separation column (see "Con-
￭
necting the separation column", page 48).
930 Compact IC Flex ChS/Deg (2.930.1260)