Extraction of compounds from solution by a sorbent coated magnetic stir bar by rapid stirring (direct immersion) or by exposure to the headspace above a sample (headspace extraction).
Notes: - Related devices for simultaneous stirring and sampling include rotating disc, stir rod, and stir membrane devices.
- Rapid stirring accelerates mass transfer overcoming some of the limitations of diffusion controlled mass transfer in sessile solutions.
Source:
PAC, 2016, 88, 517. 'Glossary of terms used in extraction (IUPAC Recommendations 2016)' on page 545 (https://doi.org/10.1515/pac-2015-0903)