Heterogeneous binding assays
 A method for carrying out a binding assay is described wherein a member of a specific binding pair (sbp) and a sample are combined with a matrix of non-porous beads in a liquid medium under conditions such that the beads bind to the sbp member. The liquid medium is removed from the beads by aspiration using an aspiration tube having one or more orifices each of a diameter smaller than the minimum diameter of the smallest bead thereby allowing removal of the liquid medium while prohibiting aspiration of the beads. 
Syntex (U.S.A.) Inc.
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G01N G01N Y10S
inventional inventional additional
Hrair Mary C. Richard P. Chiu C.
Kirakossian Ericson Watts Chang