Operator`s manual

Table Of Contents
Dionex ICS-1100 Ion Chromatography System
74 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.