Patent ID: 6200814
Filing Date: 2001-03-13
Classification: B01J,B01L,B82Y,G01N,Y10S,Y10T

Abstract:
A method for analyzing association of an analyte in a fluid sample, which method comprises the steps of:providing a flow cell having a sensing area on a wall surface thereof, the sensing area being capable of interacting with the analyte;passing the fluid sample in a first laminar flow through the flow cell;passing analyte-free fluid in a second laminar flow through the flow cell, the second laminar flow being adjacent to the first laminar flow and forming an interface therewith which extends along the wall surface;in a first state, setting the relative flow rates of the laminar flows to place the interface between the laminar flows such that the fluid sample does not contact the sensing area;in a second state, changing the relative flow rates of the laminar flows to displace the interface laterally such that the fluid sample contacts the sensing area; anddetermining association of analyte in the fluid sample to the sensing area.