Empore™ Disks, Chelating

Empore™ chelating disks are ion-exchange extraction disks that allow for the selective removal of multivalent metal cations from solutions. The selectivity of these Empore chelating disks makes them quite versatile. In fact, Empore chelating SPE disks can be used to concentrate metals from a sample for analysis or to isolate and remove metal interferences from a complex organic or inorganic sample matrix. In the latter case, the purified filtrate is then ready for use.

The Empore chelating resin SPE disk has an affinity for multivalent (primarily 2+ and 3+) transition elements. The functional group exhibits differing ionic charges depending on the pH of the solution.
For example:
• at pH 2, the carboxylate groups are neutral and the nitrogen has a net positive charge. This allows the Empore chelating disk sorbent to function as a weak anion exchanger
• increasing the pH ionizes the carboxylate groups and at pH 5, both are negatively charged
• as the pH approaches neutral, the Empore chelating resin SPE disk sorbent functions as a cation exchanger

Empore Cation Exchange-SR SPE Disk Product Availability:

• 47mm diameter
• 20 packs