Patent ID: 6833068
Filing Date: 2004-12-21
Classification: B01J,B01L,G01N

Abstract:
An apparatus for passive control of sample transport through microchannels, comprising:a separation channel having an inlet end and an outlet end, wherein said separation channel is provided with a first reservoir in fluid communication with the inlet end and a second reservoir in fluid communication with the outlet end; a sample channel having an inlet end and an outlet end intersecting and in fluid communication with said separation channel, wherein said sample channel is provided with a first reservoir in fluid communication with the inlet end and a second reservoir in fluid communication with the outlet end; and at least two auxiliary flow channels, each having an inlet and outlet end, disposed on both sides of said separation channel, wherein the inlet ends of said auxiliary flow channels are in fluid communication with said sample channel and the outlet ends of said auxiliary flow channels are joined to said separation channel, and wherein the sum of the rates of fluid flow through said auxiliary flow channels is less than that through said separation channel.