Patent ID: 8802026

Claim:
An immunoassay or selective adsorption assembly comprising a flow-through assay unit and an aspiration pump; wherein the flow-through assay unit includes a pair of porous bed supports trapping between them solid phase support beads with a reaction reagent mounted on their surface, an open proximal end, and an open distal end of smaller diameter than the proximal end; wherein the aspiration pump includes a pump block, a piston, and an inlet port formed in the pump block and sized to receive the distal end; the aspiration pump is in fluid communication with the flow-through assay unit via the distal end to draw fluid therethrough; the aspiration pump is vertically oriented with the inlet port being conical at a top of the aspiration pump; and the assay unit has a corresponding tapered opening at the distal end so that the assay unit is mountable upon the pump in fluid-tight fashion.