Ion chromatograph ICThe common problems with ion chromatography mainly include abnormal pressure (high, fluctuation), leakage, retention time drift, baseline issues (drift, noise), abnormal peak shape, etc. Today, we will talk about these issues:
Abnormal pressure of ion chromatograph IC:
Possible reasons for non pressure and non flowing mobile phase:
1. Fuse breakage or power issue;
2. The plunger rod is broken;
3. There is insufficient air or mobile phase inside the pump head;
4. The one-way valve is damaged or solid particles adhere to it;
5. Leakage;
6. The pressure sensor is damaged (the mobile phase flows normally, but there is no pressure).
Ion chromatograph ICPossible reasons for sustained high or rising pressure:
4. The flow rate is set too high;
2. Blockage of the protective column or chromatographic column sieve plate;
3. Improper use of mobile phase or buffer salt precipitation;
4. Improper selection of chromatographic columns;
5. The injection valve is damaged or blocked;
6. Blockage of the line filter;
7. The pipeline is tightened and blocked.
Ion chromatograph ICPossible causes of pressure fluctuations:
1. There are bubbles in the pump head;
2. The one-way valve is damaged;
3. The plunger sealing ring is damaged;
4. Insufficient degassing;
5. System leakage;
6. Gradient elution was used.