Dionex ICS-1000 - Nonreproducible Peak Height or Retention Time; Abnormal Retention Time or Selectivity

4 • Troubleshooting
Doc. 031879-01 3/03 4-17
• Malfunctioning injection valve
1. Rebuild the injection valve (see Section 5.4
).
2. If the valve leak persists, contact Dionex for assistance.
4.9 Nonreproducible Peak Height or Retention Time
• Column overloading
Dilute the sample (see Section 3.9
).
• Liquid leaks
Locate and eliminate the leaks (see Section 4.2
).
• Incomplete or imprecise filling of the sample loop
1. Fill the sample loop until excess sample exits the waste line.
2. Inspect the 1-cc syringe (P/N 016388) and replace if damaged.
• Pump not primed properly
Prime the pump (see Section B.12
).
4.10 Abnormal Retention Time or Selectivity
• Contaminated or incorrect eluent
Remake the eluent, using concentrated eluent and ASTM filtered, Type I (18-
megohm) deionized water.
• Contaminated or degraded sample
Take appropriate precautions when preparing and storing samples to prevent
contamination and degradation (see Section 3.9
).
• Contaminated column
1. Clean the column as instructed in the column manual. Column manuals
are included on the Dionex Reference Library CD-ROM (P/N 053891),
located in the ICS-1000 Ship Kit (P/N 057905).
2. If cleaning is unsuccessful, replace the column.