Field-flow fractionation in which the physical force field is the Earth’s gravitational field.
Notes: - GFFF can fractionate particulate matter in the micrometre size range (large microorganisms, blood cells, sediments, etc).
- Since the Earth’s gravitational field produces relatively weak forces, this mode is only appropriate for micron size particles, hence the separation is an example of hyperlayer focusing field-flow fractionation.
Source:
PAC, 2017, 90, 181. 'Terminology of separation methods (IUPAC Recommendations 2017)' on page 221 (https://doi.org/10.1515/pac-2017-0111)