Metal contaminants or precipitates - ERD 500 - ERS 500e - ERS 500 Carbonate - DRS 600 - Metal contaminants or precipitates - ERD 500 - ERS 500e - ERS 500 Carbonate - DRS 600

Procedure

1. Turn off the suppressor power and system pump.
2. Disconnect the analytical (and guard) column(s) from the injection valve and the suppressor. Refer to the specific analytical column Product Manual for column cleanup procedures.
3. If you are running in the Auto Suppression External Water Mode, turn off the external water and disconnect the external water line from the suppressor REGEN IN port.
4. Disconnect the liquid line from the suppressor ELUENT OUT port to the cell at the cell fitting and reconnect it to the REGEN IN port.
5. If iron is present, then connect a temporary line from the priming block or the low-pressure tee on the isocratic or gradient pump to a container with a solution of 0.2 M oxalic acid. For 4 mm systems pump this solution through the suppressor at 1 – 2 mL/min for 30 minutes. For 2 mm systems pump this solution through the suppressor at 0.25–0.50 mL/min for 30 minutes.

6. NOTE

   Bypassing internal pump manifolds when temporarily pumping high concentration cleaning solutions significantly reduces the time required to re-equilibrate the system to low concentration eluents.

6. Perform an extended regeneration, as outlined in Full or extended regeneration.
7. Reinstall the analytical (and guard) column(s). Begin pumping eluent through the system at the flow rate required for your analysis and equilibrate the system and resume normal operation.