Eclipse ™ carries out field-flow fractionation (FFF) of macromolecules and nanoparticles ranging in size from 1 nm - 1000 nm, with no stationary phase, eliminating shear and non-ideal column packing interactions.

A wide choice of channels separates both soluble and colloidal components, from nanogram to milligram quantities.

https://www.wyatt.com/products/instruments/eclipse-field-flow-fractionation-system.html