Depending on the extent of capacity loss of the suppressor, the regeneration procedure outlined in Suppressor electrolytic regeneration may be inadequate to fully regenerate the suppressor.
In order to fully regenerate the suppressor, an extended rinse (for at least two hours) with 200 mN sulfuric acid (for Dionex AERS 600, Dionex AERS 500e or Dionex AERS 500 Carbonate) or 200 mN NaOH (for Dionex CDRS 600 or Dionex CERS 500e) at the application flow rate is needed.
Procedure
- Pump the acid or base (as the case may be) through the eluent out port of the suppressor, with a line connecting the eluent in port to the regen in port.
- Divert a line from the Regen out port to waste. A standalone pump or a trap column/suppressor clean-up kit (Item # 059659) could be used for the above regeneration.
- Alternatively, pursue the regeneration as outlined in Step 3 of Suppressor chemical regeneration and then allow the acid or base to soak in the suppressor overnight. In the morning, repeat Step 3 of Suppressor chemical regeneration and then displace the acid or base with DI water.
If the correct peak areas are not observed following two injections of a standard test solution, contact the nearest Thermo Fisher Scientific Regional Office (see Thermo Fisher Scientific Worldwide Offices on the Reference Library CD-ROM).
NOTE
The sulfuric acid in the above steps could be replaced with a non-oxidizing strong acid such as Methanesulfonic acid (MSA) which is recommended when pursuing MS applications.
NOTE
Do not use the Analytical pump for regeneration, as this would contaminate the pump.