| 摘要 |
A system for assaying a fluid sample by detection of radiation emitted from a ligand/conjugate complex formed on a plurality of beads dimensioned within a specified range of diameters, the beads being disposed as a porous mass in a conduit adjacent a fluid-porous screen having pores of lesser diameter than the range of diameters of the beads. A plurality of paramagnetic particles is suspended across the conduit by a magnetic field of sufficient intensity to array the paramagnetic particles as the fluid-porous screen.
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