equilibrium dialysis

n.
  1. A method for determining the association constants for hapten-antibody reactions, by placing hapten and antibody in compartments separated by a semipermeable membrane, thereby allowing hapten to diffuse across the membrane until its concentration reaches equilibrium.
The American Heritage® Stedman's Medical Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.