Metrohm 828 IC Dual Suppressor - Manual (Page 38)

4 Troubleshooting - Problems
828 IC Dual Suppressor/ 8.828.1003 Instructions for Use
30
4 Troubleshooting - Problems
4.1 Remedying faults and problems
If difficulties occur during analyses with your IC system then it is best to
search for their causes in the following sequence: column → pump →
eluent → IC system. In the Instructions for Use of your MIC 10
Modular IC system or 761 Compact IC you will find an overview of
possible faults together with their causes and remedies.
In addition to these general problems, the following section covers
those problems which could arise from the use of the 828 IC Dual
Suppressor.
4.2 Chromatography problems
Problem Cause Remedy
Poor peak shape • Dead volume in system.
• Weak eluent, unsuitable
gradient program.
• Space inside the suppressor
cell.
• Check that the capillary connections are
tight. Keep the length of the PEEK
capillaries between the column and IC
Dual Suppressor and between the IC Dual
Suppressor and detector as short as
possible and make sure that a capillary
with the correct inner diameter is used
(6.1831.010).
• Make up a new eluent, correct the
gradient.
• Exchange suppressor cell, see Section
5.5.2.
Poor retention time
reproducibility • Leak in the instrument.
• Flow rate ratio not correct.
• Blockage in flow path.
• High pressure in system.
• Check whether liquid is escaping from
drain 20, replace leaking connections.
• Check the flow rate ratio, Section 3.5.
• See Section 4.3.
• See Section 4.3.