Analysis and fractionation of particles near surfaces

Details Analysis and fractionation of particles near surfaces Analysis and fractionation of particles near surfaces

B - Operations, Transporting

01

D

B01D 57/02 (2006.01) B01D 59/42 (2006.01) B01D 59/50 (2006.01) B01D 61/58 (2006.01) B03C 5/02 (2006.01) C02F 1/469 (2006.01) C12M 1/42 (2006.01) C12Q 1/06 (2006.01) G01N 15/02 (2006.01) G01N 27/26 (2006.01) G01N 27/447 (2006.01)

Patent

CA 2441194

A method and apparatus for fractionation of a mixture of particles and for particle analysis are provided, in which LEAPS ("Light-controlled Electrokinetic Assembly of Particles near Surfaces") is used to fractionate and analyze a plurality of particles suspended in an interface between an electrode and an electrolyte solution. A mixture of particles are fractionated according to their relaxation frequencies, which in turn reflect differences in size or surface composition of the particles. Particles may also be analyzed to determine their physical and chemical properties based on particle relaxation frequency and maximal velocity.

L'invention concerne un procédé et un appareil de fractionnement d'un mélange de particules et d'analyse de particules dans lesquels LEAPS ("ensemble électrocinétique photorégulé de particules près de surfaces") est utilisé pour fractionner et analyser une pluralité de particules en suspension dans une interface entre une électrode et une solution d'électrolyte. Un mélange de particules est fractionné selon leurs fréquences de relaxation, lesquelles à leur tour reflètent des différences de grosseur ou de composition de surface des particules. Les particules peuvent aussi être analysées afin de déterminer leurs propriétés physiques et chimiques sur la base d'une fréquence de relaxation et d'une vitesse maximale de particules.

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