OMNIS MCS Unit

The OMNIS MCS Unit serves as a CO₂ suppressor in the OMNIS IC System. The Metrohm CO₂ Suppressor (MCS) removes CO₂ from the eluent flow. Together with the MSM, the MCS acts as a sequential suppressor. This lowers the background conductivity and reduces the baseline noise, which improves detection sensitivity. The system peak is minimized.

In the MCS, the eluent flows through a capillary that is permeable for gases. A vacuum pump is used to create a difference in pressure and concentration and the CO₂ is diffused out of the capillary in the eluent flow. To remove the CO₂ from the MCS, a constant CO₂-free air flow is drawn through the air inlet.

Learn more about sequential suppression: Monograph Ion Chromatography.

Specifications:

• Time to establish vacuum: 10 s
• Flow path: Free of metal