Thermo Scientific Dionex ICS-1100, Operator'S Manual

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Dionex ICS-1100 Ion Chromatography System
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Doc. 065289-03 10/12
If you have trouble isolating the restriction, refer to Section 5.2 .
•
Plugged or damaged fitting
Isolate the faulty fitting by loosening fittings, one by one, until the pressure
returns to normal. Repair or replace the fitting (see
Section 5.3 ).
•
Flow rate through the columns too high
Set the correct rate for your application. If an incorrect flow rate calibration is
suspected, calibrate the flow (see
Section 5.1.3 ).
•
Clogged column bed supports
Refer to the instructions in the column manual for troubleshooting guidance.
Column manuals are included on the Thermo Scientific Reference Library
DVD (P/N 053891).
•
Contaminated columns
Clean the columns as instructed in the column manual or replace the guard
column.
•
Plugged injection valve or auxiliary valve passages
Rebuild the valve (see Section 5.4 ).
4.9 Peak “Ghosting”
“Ghosting” is the appearance of extraneous peaks in a chromatogram. These may
be late-eluting peaks from a previous injection. They may also 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.