Sorbent-coated disc consisting of a polytetrafluoroethylene (PTFE) base with an integrated magnet and a sorbent film attached to one side.
Note: Facilitates more rapid stirring than conventional sorbent-coated stir bars (see
stir bar sorptive extraction) without deterioration of the sorbent coating, because it is not in contact with the vessel wall.
Source:
PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 547 (https://doi.org/10.1515/pac-2015-0903)