Thermo Scientific Dionex ICS-2000, Operator'S Manual

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4 • Troubleshooting
Doc. 031857-03 4/06
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Clogged column bed supports
Refer to the instructions in the column manual for troubleshooting guidance.
Column manuals are included on the Dionex Reference Library CD-ROM
(P/N 053891).
•
Contaminated columns
Clean the columns as instructed in the column manual.
•
Plugged injection valve passages
Rebuild the injection valve (see Section 5.4 ).
4.8 Peak “Ghosting”
“Ghosting” is the appearance of extraneous peaks in a chromatogram. These may
be late-eluting peaks from a previous injection, or they may be the result of a
contaminated standard or eluent, or a malfunctioning injection valve. These peaks
may co-elute with peaks of interest, resulting in nonreproducible peak
heights/areas.
•
Insufficient time between sample injections
Wait until the previous sample has been completely eluted before making
another injection.
•
Insufficient flush between samples
Flush the sample loop with at least 10 loop volumes of deionized water or
sample between sample injections.
•
Incorrect or contaminated standards
Remake standards.
•
Incorrect or contaminated eluent
Verify that the correct eluent concentration is selected.
Install or replace the end-line filter on the end of the deionized water line (see
Section 3.4.1 ).
•
Malfunctioning injection valve
1. Rebuild the injection valve (see Section 5.4 ).
2. If the valve leak persists, contact Dionex for assistance.