Patent ID: 7341696
Filing Date: 2008-03-11
Classification: G01N

Abstract:
1. A sensor for independently detecting a plurality of analytes in a test solution, comprising: a test vessel; a semipermeable membrane with pores for retaining the analyte, dividing said test vessel into a first volume and a second volume, wherein a surface of said membrane is chemically modified by attachment of at least two distinct membrane surface modifiers on at least a side facing said first volume but not within said pores, wherein said at least two distinct membrane surface modifiers are patterned into an array of distinct regions on said membrane surface; at least two distinct groups of immunoassay labels disposed within said first volume, wherein each of said groups of immunoassay labels has distinct label binding ligands where these label binding ligands will have a binding affinity for one of said distinct membrane surface modifiers in the presence of the analyte, and a measurably different binding affinity for said one of said distinct membrane surface modifiers in the absence of the analyte; a pressure source, for driving said test solution from said first volume into said second volume; and a label detecting system, for detecting the presence or absence of said labels in each of said regions on said membrane.