4
– Troubleshooting
Thermo Scientific
Product Manual for Dionex Anion Chemically Regenerated
Suppressor for ICE
Page 19 of 22
032661-12
3.
If there is flow from the ELUENT OUT port but no eluent suppression, the
membrane may have been contaminated. Try to restore system performance by
cleaning the membrane (see Section 5, “Cleanup”).
C.
Remake the regenerant to be sure that the concentration is correct and that the solution
has been freshly prepared. Be sure that chemicals of the required purity were used to
make the regenerant (see Section 3.1). If the regenerant concentration is too high or too
old, it can cause high background conductivity. Dionex recommends the use of Dionex
Cation Regenerant Concentrate (P/N 039602) for the best performance.
D.
Remake the eluent to be sure that the concentration is correct. Be sure that chemicals of
the required purity were used to make the eluent (see Section 3.1). If the eluent
concentration is too high, the Dionex ACRS-ICE 500 will not be able to suppress it,
resulting in high background conductivity.
E.
If the background conductivity remains high, and you cannot solve the problem on
your own, contact the Dionex Regional Office nearest you (see, “Dionex Worldwide
Offices”).
4.2
Drifting Baseline
A.
Increase the regenerant flow rate by decreasing the length of the 0.012" i.d. restrictor
line on the regenerant waste line or by increasing the pressure on the reservoir.
B.
Remake the regenerant to be sure that the concentration is correct and that the solution
has been freshly prepared. Be sure that chemicals of the required purity were used to
make the regenerant (see Section 3.1). If the regenerant has absorbed carbon dioxide
from the air, it can cause a drifting baseline.
4.3
Decreased Sensitivity
A.
Check for leaks throughout the system. If a fitting is leaking, tighten it carefully until
the leak stops.
B.
Ensure that the injection valve is operating correctly. Refer to the valve manuals that
accompany the chromatography module for troubleshooting assistance. Be sure to
check the slider port faces for damage.
C.
Check the regenerant flow rate. If the flow rate has decreased from the selected setting,
reset it to the initial conditions.
D.
If sensitivity remains low, clean the suppressor (see Section 5).
E.
If cleaning the membrane does not restore sensitivity, the Dionex ACRS-ICE 500 may
need to be replaced.
F.
If you cannot solve the problem on your own, contact the Thermo Scientific Dionex
Regional Office nearest you (see, “Thermo Scientific Dionex Worldwide Offices”).
