Patent ID: 9034173
Filing Date: 2015-05-19
Classification: B03C

Abstract:
1. A method for dielectrophoresis for concentrating particles from a liquid medium using a microfluidic dielectrophoresis system, wherein the microfluidic dielectrophoresis system includes: a supply device for a liquid medium having particles contained therein; N≧2 microfluidic, dielectrophoretically active channels (K n , where 1≦n≦N), which are equipped with electrodes; lines for fluidic connection of the supply device to the channels (K n ), for connection of the channels (K n ) to one another, and for drainage of the medium or the particles from the channels (K n ); and valves for setting a flow direction of the medium in the lines; wherein the dielectrophoretically active channels (K 1 to K N ) are situated and are connected by lines in such a way that they may be operated connected in parallel or in series by switching the valves in relation to the flow direction of the medium, and the electrodes of the various channels (K 1 to K N ) are activatable independently of one another; the method comprising: A) an accumulation phase, including the following steps: B) a concentration phase following the accumulation phase, the concentration phase including the following steps; and C) flushing the collected particles from the concentration phase out of the channel K