Ultrafiltration vs. Ultracentrifuge — What's the Difference?

Ultrafiltration (UF) is a variety of membrane filtration in which forces like pressure or concentration gradients lead to a separation through a semipermeable membrane. Suspended solids and solutes of high molecular weight are retained in the so-called retentate, while water and low molecular weight solutes pass through the membrane in the permeate (filtrate).

The ultracentrifuge is a centrifuge optimized for spinning a rotor at very high speeds, capable of generating acceleration as high as 1 000 000 g (approx. 9 800 km/s²).

The filtration of a solution or colloidal substance through a semipermeable medium that allows only the passage of small molecules.

A high-velocity centrifuge used in the separation of colloidal or submicroscopic particles.

Filtration through a semipermeable membrane that only allows small molecules through.

A high-speed centrifuge, especially one free from convection that is used to separate colloidal particles.

To submit a material to ultracentrifugation

A high speed centrifuge used to determine the relative molecular masses of large molecules in high polymers and proteins

Subject to the action of an ultracentrigue