The AutoSuppression external water mode is used for any application requiring organic solvents in the eluent or sample, or for applications using borate as the eluent ion.

NOTE

AutoSuppression external water mode is the recommended method of operation for the Dionex ERS 500e. The Dionex DRS 600 and Dionex AERS 500 carbonate are also compatible with this mode.

This mode uses a constant source of deionized water from a pressurized bottle or another source of deionized water that delivers 0.25 to 2 mL/min for 2 mm applications and 1.0 to 5 mL/min for 4 mm applications, although the regenerant flow rate is typically recommended as double the eluent flow rate.

The amount of water flowing through the regenerant chambers is independent of the eluent flow rate. The AutoSuppression External Water Mode eliminates the potential for build-up of contaminating ions resulting from the oxidation of solvents.

It is also recommended when pursuing analysis with high concentrations of matrix ions, particularly transition metals. Any analysis performed using the AutoSuppression Recycle Mode can also be performed using the AutoSuppression external water mode.

See Operation for complete operating instructions.