Specialized coulometric cells

ESA offers a variety of specialty electrochemical cells to meet your application need. These range from simple guard cells to remove contaminants from samples and conditioning cells to optimize the mobile phase quality and composition, to a cell optimized specifically for integration into mass spectrometry HPLC systems to provide additional ionization power for difficult-to-analyze molecules.

Guard Cell

This cell is designed to be placed directly after the pump to remove any electroactive impurities from the mobile phase.

This cell contains a single large porous graphite electrode to which a potential is applied. ,  which  prior to the injector, column and analytical cell. Use of this cell can decrease observed background current and reduce baseline noise.  The guard cell is the only electrochemical cell designed to withstand high pressures relative to the column and is not suitable for post-column installation.

Model 5020 Guard Cell

• Minimal maintenance – robust graphite electrodes require little in the way of routine cleaning and regeneration procedures; solid-state reference electrode rarely needs maintenance

Conditioning Cell

This cell is placed after the analytical HPLC column and before the analytical cell, to eliminate potential interferences coming from the analytical components. A selected potential is applied to the electrode that is sufficient to perform redox reactions to change electrochemically active species. This cell has a small swept volume and is  optimized to minimize band spreading and is designed for low pressure application.

 Model 5021A Conditioning Cell