Metrohm 930 Compact IC Flex ChS User Manual
Page 90
6.1
￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭￭
82
￭￭￭￭￭￭￭￭
930 Compact IC Flex ChS (2.930.1200)
Problem
Cause
Remedy
Injection valve – Valve
blocked.
Have the valve cleaned (by a Metrohm service
technician).
The retention times
in the chromato-
gram have changed
unexpectedly.
Separation column –
Diminished separating effi-
ciency.
￭
Regenerate the separation column (see
Chapter 5.13.4, page 79).
￭
Replace the separation column (see "Con-
necting the separation column", page 44).
The eluent contains gas
bubbles.
￭
Ensure that the connectors for the eluent
degasser are firmly connected .
￭
Deaerate the high-pressure pump (see Fig-
ure , page 39).
High-pressure pump –
Defective.
Request Metrohm Service.
Peak areas are
lower than
expected.
Sample – There is a leak in
the sample path.
Find and fix the leak in the sample path.
Sample – The sample path
is blocked.
Find and fix the blockage in the sample path.
Sample – The sample loop
is not (completely) filled.
Adjust the transfer time for the sample (see
"Determining the transfer time", page 77).
Sample – There are gas
bubbles in the sample.
Use the sample degasser .
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 is defective.
1. Save column configuration in MagIC Net™.
2. Notify Metrohm Service.
Individual peaks are
greater than
expected.
Sample – Sample carry-
over from the previous
measurement.
Check the rinsing time (see "Checking the rins-
ing time", page 78).
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 72) or replace parts (see Chapter
5.10.3.4, page 74).
The background
conductivity is too
high.
The suppressor is not con-
nected.