Extraction phase in the form of sorbent particles.
Note: Particles are typically of a nanometre size and applied in the dispersion mode of extraction.
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)