Metrohm 2.850.9110, Руководство пользователя

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2.850.9110 IC Amperometric Detector
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Problem Cause Remedy
No measuring sig-
nal. IC system – No power sup-
ply. Check the power connection and the supply
voltage.
Peaks cut off at the
top. Measuring range too
small.
￭
Set a less sensitive measuring range.
￭
Reduce the peak height, e.g. by means of
sample dilution.
5.7 Problems with the chromatogram
Problem Cause Remedy
Peak drift with
sugar analysis.
Carbonate absorption in
the eluent. Use the Metrosep CO3 Trap 1 (6.1015.300)
trap column.
Peaks have poor res-
olution. IC system – Diminished
separating efficiency of the
separation column.
￭
Regenerate the separation column (see
Chapter Operation and maintenance in the
manual for the IC instrument).
￭
Replace the separation column (see Chap-
ter Operation and maintenance in the
manual for the IC instrument).
IC system – Eluent is old. Prepare a new eluent.
The ionic strength of the
sample or the pH value of
the sample deviates greatly
from the eluent. Dilute the sample or optimize the pH value of
the sample.
Absorption of analyte at
the electrodes. Use a suitable combination of electrodes and
eluent.
The retention times
in the chromato-
gram have changed
unexpectedly. IC system – Diminished
separating efficiency of the
separation column.
￭
Regenerate the separation column (see
Chapter Operation and maintenance in the
manual for the IC instrument).
￭
Replace the separation column (see Chap-
ter Operation and maintenance in the
manual for the IC instrument).
IC system – Eluent is old. Prepare a new eluent.
The ionic strength of the
sample or the pH value of
the sample deviates greatly
from the eluent. Dilute the sample or optimize the pH value of
the sample.