Metrohm 881 Compact IC pro – Anion – MCS User Manual
Page 109
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6 Troubleshooting
881 Compact IC pro – Anion – MCS
￭￭￭￭￭￭￭￭
99
Problem
Cause
Remedy
Suppressor – regeneration
or rinsing solution flow
problems.
Check the flow of the regeneration solution
and the rinsing solution.
Data of the separa-
tion column cannot
be read.
Column chip contamina-
ted.
Clean the contact surfaces of the column chip
(with alcohol).
Column chip defective.
1. Save column configuration in MagIC Net™.
2. Notify Metrohm Service.
Individual peaks
greater than expec-
ted
Sample – carry-over of the
samples from previous
measurement.
Rinse system longer between two samples.
Poor reproducibility
of the retention
times
Eluent – Leak in the eluent
path.
Check the eluent path
Eluent – Blockage in the
eluent path.
Check the eluent path
Suppressor – No (or
insufficient) pump-
ing of regeneration
or rinsing solution
Leak in the system.
Check connections.
Peristaltic pump – contact
pressure too weak.
Correctly set contact pressure (see "Set the
contact pressure", page 50).
Peristaltic pump – filter
blocked .
Replace the filter (see "Replacing the filter",
page 86).
Suppressor – backpressure
too high.
Clean the suppressor (see Chapter 5.12.3.3,
page 90) or replace parts (see Chapter
5.12.3.4, page 91).
Peristaltic pump – pump
tubing defective.
Replace pump tubing.
Chromatograms
have poor resolution
Separation column –
diminished separating effi-
ciency.
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Regenerate separation column (see Chap-
ter 5.14.4, page 95).
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Replace separation column (see "Connect-
ing and rinsing the separation column",
page 61).
Extreme spread of
the peaks in the
chromatogram.
Splitting (dual
peaks)
Capillary connections –
dead volume in the system.
Check connections (see Chapter 3.5, page 17)
(use PEEK capillaries with an internal diameter
of 0.25 mm between the injection valve and
detector).
Guard column – diminished
performance.
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