The MCS removes any residual CO2 and thus provides 20 to 50% larger peak areas, an extremely low background conductivity and an excellent linearity of calibration
In ion chromatography (IC), suppression techniques are designed to improve the analytical performance where conductivity detection is normally used.
Depending on the application, electronic or chemical suppression techniques can be applied.
While the first technique is appropriate for most cation analyses, the latter technique is preferentially used for anion analysis.
Chemical suppressors utilise cation exchange (packed-bed suppressor, MSM) to replace the metal cations accompanying the anions of interest by the more conductive hydronium ions.
Moreover, the cation exchange transforms highly conductive eluents (hydroxide or carbonate/hydrogen carbonate eluents) to non-dissociated and thus weakly conductive substances.
The reduced baseline conductivity and the enhanced conductivity of the analytes results in a significant improvement of the detection limits.
Yet another outstanding sensitivity enhancement in suppressed IC is achieved by the installation of the MCS CO2 Suppressor between the MSM and the conductivity detector.
Moreover, the interfering injection and system peaks are largely eliminated.
