The MPIC Suppression Mode uses an applied current and a constant source of dilute boric acid regenerant solution from a pressurized bottle delivery system. Dilute boric acid is added to the water regenerant to enhance detection and improve the linearity of weak bases such as ammonia and amines. This mode is used for MPIC applications requiring an ion pair reagent and organic solvents in the eluent.

The MPIC Suppression Mode reliably provides suppression of typical eluents for MPIC applications using suppressed conductivity detection. The ion pair reagents, such as octanesulfonic acid (OSA), are used in concentrations typically ranging from 1.0 to 5.0 mM. Organic solvent concentrations should not exceed 40%.

See Operation for complete operating instructions.

NOTE

The Dionex CDRS 600 and Dionex CERS 500e can be used for eluent suppression of MPIC eluents by using the AutoSuppression external water mode or the MPIC suppression mode depending on the specific MPIC application.