Ultrafiltration 368389 225195593 2008-07-12T11:50:53Z 85.250.63.70 interwiki [[Image:Ultrafiltration.png|thumb|right|The apparatus of Ultrafiltration in a laboratory]] '''Ultrafiltration''' ('''UF''') is a variety of [[membrane filtration]] in which hydrostatic pressure forces a liquid against a [[semipermeable membrane]]. Suspended solids and solutes of high molecular weight are retained, while water and low molecular weight solutes pass through the membrane. This [[separation process]] is used in industry and research for purifying and concentrating macromolecular (10<sup>3</sup> - 10<sup>6</sup> [[Atomic_mass_unit|Da]]) solutions, especially protein solutions. Ultrafiltration is not fundamentally different from [[reverse osmosis]], [[microfiltration]] or [[nanofiltration]], except in terms of the size of the molecules it retains. More specifically, it can refer to: * [[Ultrafiltration (industrial)]] * [[Ultrafiltration (renal)]] * [[Aquapheresis]] {{disambig}} [[cs:Ultrafiltrace]] [[de:Ultrafiltration]] [[fr:Ultrafiltration]] [[he:אולטראפילטרציה]] [[pl:Ultrafiltracja]] [[pt:Ultrafiltração]] [[zh-classical:超濾法]]