Metrohm 930 Compact IC Flex SeS - Manual (Page 97)

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6 Troubleshooting
930 Compact IC Flex SeS (2.930.1400)
￭￭￭￭￭￭￭￭ 89
Problem Cause Remedy
Suppressor – Insuffi-
cient flow of regen-
eration solution or
rinsing solution. There is a leak in the sys-
tem. Check all connections.
Suppressor – Backpressure
too high. Clean the suppressor (see Chapter 5.10.3.3,
page 77) or replace parts (see Chapter
5.10.3.4, page 79).
The background
conductivity is too
high. The suppressor is not con-
nected. Connect the suppressor (see Chapter 3.10,
page 28).
The incorrect eluent is
being used. Change the eluent (see Chapter 5.4.2, page
56).
Suppressor – No or insuffi-
cient flow of regeneration
solution or rinsing solution. Check the flow of the regeneration solution
and the rinsing solution .
MCS – The CO
2
suppressor
is not connected.
Connect the CO
2
suppressor.
The retention times
are poorly reprodu-
cible. The eluent path has a leak. Check all of the connections along the eluent
path and fix the leak.
The eluent path is blocked. Check the eluent path and fix the blockage.
The eluent contains gas
bubbles. ￭ Inspect the connectors for the eluent
degasser .
￭ Deaerate the high-pressure pump (see
Chapter 3.15, page 42).
Baseline increasing
strongly. Suppressor – Reduced
capacity. Regenerate the suppressor (see Chapter
5.10.3.2, page 76).
SPM – Reduced capacity. Regenerate the SPM (see Chapter 5.10.3.2,
page 76).
Chromatograms
have poor resolution Separation column –
Diminished separating effi-
ciency. ￭ Regenerate the separation column (see
Chapter 5.14.4, page 85).
￭ Replace the separation column (see "Con-
necting the separation column", page 49).
Extreme spread of
the peaks in the
chromatogram.
Splitting (dual
peaks) Capillary connections –
dead volume in the system. Check the capillary connections (see Chapter
3.2, page 13) (use PEEK capillaries with an
inner diameter of 0.25 mm between the injec-
tion valve and detector).